Placeholder Image

Subtitles section Play video

  • On the subject of small and big revolutions in the schools we call to the stage Ricardo Semler.

  • Ricardo is CEO and major stakeholder of SEMCO SA and director of FIESP (Industry Federation of São Paulo)

  • He has a bachalor degree in laws from USP (University of São Paulo) and a degree in Business from Harward

  • He is author of international best-sellers like Turning the tables (Mavericks)

  • and Seven Days Weekend.

  • in 1990 created the Ralston/Semler Foundation with the goal to research and

  • contribute to find solutions for innovation in the education of Brazil.

  • He is also the cretor of the Project Lumiar Sinapses. With the word, Ricardo Semler.

  • First I need to complain with Positivo because it's not fair to put me after Nicolélis.

  • I didn't invent anything, nothing will be walking around because of me

  • But...

  • when I think about our current moment in education

  • it reminds me the story of the guy that will

  • do skydive and they tell him that he only needs three things

  • first

  • to open that parachutes he should press the green button

  • if it doesn't open...

  • then press the red button

  • and when you land don't start to walk around because a Van will come to pick you up.

  • The man jumps, press the first button

  • nothing happens

  • he thinks, keep calm, keep calm, you have the second button. He press the second button

  • and nothing happens and then he thinks...

  • Now, I hope the Van is still waiting for me.

  • The feeling I have is that we came from the

  • greek education

  • approach,

  • with a tutor.

  • From the concept that

  • education is something for few people.

  • Then we passed through a moment

  • of middle age

  • where a lot was lost

  • and restarted again with the Iluminism

  • idea the you have to train the brain.

  • And education is basically about the brain.

  • And the brain is

  • naturally taken, like we heard here already,

  • to a perspective where you can measure,

  • and things you can understand and also

  • the market and employment...

  • and that we are trying to create people to power the current market and work force

  • but we don't understand the current market even less the future one.

  • And in a second moment, and what I think is the second button in the parachute

  • Henry Ford's idea that it's not doable. To educate everybody...

  • you have to create an assembly line.

  • The schools we have today are the result of that. Well, simplifying:

  • I have millions of kids I need to to prepare

  • for the market. How can I do that?

  • Let's see

  • They asked the University of Chicago,

  • in 1908,

  • also the same year

  • of the assembly line from Ford,

  • How can I dod that?

  • And the answer was...

  • What is the attention span of a kid?

  • Around 53 minutes was the answer, at that time.

  • How many kids I can put in the same room?

  • Considering the louder a

  • teacher can communicate and not stress himself toi much

  • and also keep the order

  • ...

  • around 35 kids

  • And how can I share the knowledge?

  • Don't know, ask the biologist, the mathematician, and everyone comes up with their plan

  • So, mr. biologist, what's the deal?

  • Hum, first we start with amoeba, and then that, and then the division, so on and so forth.

  • What about Math? First addition, then subtraction, some numbers here, sine and cosine... got it?

  • Then you think, well, I'm gonna create something called Curriculum.

  • I put everything side by side and I'm gonna create people who passed through everything

  • but is absolutely schizophrenic,

  • necessarily schizophrenic.

  • They passed through all that because the student takes a Trigonometry 2 class

  • then goes to history of Japan, to cell division, and then

  • he has to find a way to put everything together. It is absolutely impossible e nobody ever did that.

  • With time, the University of Chicago started to measure that

  • And concluded that the american curriculum (with 1552 pages at the moment) detailing what

  • should be taught

  • in which year and age

  • and concluded that the retention of knowledge

  • of the students who went through that system

  • was 6.7%.

  • Which means you are

  • in a business that 92, 93% of failure

  • and that's what we do.

  • Then you think, who is going to find a better approach for us?

  • Maybe consultants could be a good idea

  • and academic researches,

  • And now we are talking about the Van,

  • that...

  • will never arrive.

  • Or the entrepreneur that comes from outside, no, everything is wrong.

  • let me explain to you: management

  • change the principal and the director

  • and recycle the teachers

  • Got it?

  • But that man who is teaching you

  • has also almost the same rate of failure. 91% of the companies doesn't last more than 20 years.

  • 91.1% of the companies...

  • The man who

  • learned

  • that 91% of what he does fail, is teaching someone with a

  • 93% rate of failure.

  • There is something wrong.

  • The notion of making marginal improvements

  • in a system

  • that is obsolete by definition, by design

  • is nuts

  • and we are doing that more and more

  • because we are getting

  • anxious

  • to realize that it is not working.

  • And I'm not talking about Brazil only.

  • There's no exception in the world.

  • There's no place in the world, not even in Finland, or any place

  • where people are completely happy with their education system.

  • But we are making it work

  • based on a rules somebody invented.

  • The OECD came up with the Pisa exam that tests Portuguese (or English) and Math

  • wait?!

  • But 4

  • of the 5th best places in the world accordingly to that, are dictatorships

  • Have you ever stopped to think about? That's what we are trying to mimic

  • The best placed in the Pisa exam

  • is the communist dictatorship of Shanghai.

  • The other is Korea, where the student spend 12 hours per day in class, including Saturdays and still have

  • home-work.

  • And we are saying that this is the formula to generate

  • happy people

  • No! That a formula to generate a lot of people that learn to memorize 12 hours a day

  • and then take a an exam of language and math and goes well.

  • Will that approach

  • generate people capable for the market on a new world? No way!

  • When you entered in this profession did you get in thinking I'm gonna learn

  • the rules

  • learn the right ways

  • and control those kids

  • or did you have an ideal?

  • That idea was lost long ago.

  • Your lost ideal

  • mixed with kids that don't want to be in class.

  • And people discuss why schools more and more looks like Febens (brazilian reformatory)

  • It's because the Febens improved. Am I wrong?

  • Febens doesn't have watchtowers anymore and other things.

  • And the schools have metal detectors and high walls

  • So it's getting closer.

  • The question is why we are doing that? Because they don't want

  • to be there.

  • If you let they will runway

  • so you can't allow that.

  • Now that the kids are here, we have them for 13 years at our availability

  • And what we'll do with them?

  • Well let's

  • give them all the curriculum for math, biology, history and etc.

  • And then we'll commit a

  • fraud that we all agreed to.

  • I'm gonna give an exam because the parents, the mayor, etc

  • are all asking if you are doing well.

  • I'm gonna give you an exam

  • of a content

  • that if it's compared with the internet, on average,

  • would be a tiny fraction of what is available on Google about the same subject

  • I'm gonna cover just that tiny fraction

  • and I teach you that way: I write, you copy, I write, you copy, I write, you copy...

  • and at the end I say

  • done, the exam will be just about these things because if I don't say

  • what's gonna be covered the grades would miserable.

  • So, I'm gonna make a deal with you, I tell you what I'm gonna cover

  • I'm ok with cheating and everything else that helps

  • and when it is a Prova Brazil (national exam to evaluate schools), I let the worst students get "sick",

  • strangely in the exam's day. Am I wrong? Just a coincidence.

  • And them when it's done

  • I plot a chart. I get the best and I put here

  • and the worst here

  • and, well, we are not so bad, we have 4.3 which matches the national average

  • And then you think... there must be something wrong!

  • How

  • on this format, the kids learn?

  • I have 5 little kids at home

  • and people used to tell me: you have to learn to learn.

  • When you have a kid

  • starting to walk

  • like 9 months

  • you think you are helping them to learn to walk

  • it is more or less

  • like this, come... come...

  • Do you walk like that?

  • But that's how you teach right?!

  • But maybe the come from factory ready to learn.

  • We, as adults, learning a second language, it is hard...

  • third language, horrible

  • but they learn a language while learning to speak

  • and you try to teach them: fa-fat-fa-ther

  • And then they: Fish! Am I wrong? Well...

  • There's something happening and we are failing to understand it

  • in the school world.

  • I even have an example

  • at home,

  • on how...

  • on how those kids think.

  • We had a problem at home, where Fernanda, my wife, was alway too anxious

  • to

  • travel or even to go to São Paulo because our girls are too young,

  • we have twins,

  • 2 years and half.

  • They understood we had nanys

  • and the nanys where there but sometimes

  • they had their day off.

  • But Fernanda, always very anxious.

  • And one day,

  • the girls talking, the twins,

  • and the mother was in São Paulo,

  • and of the girls asked:

  • Where is mom?

  • And Olívia replied:

  • well, of course, it's her day off,

  • right, Letícia?!

  • And after that we solved all anxiety problems of the mom

  • because is just had to explain that it was a day off and they said "Ah, ok, bye!".

  • I never had more problems

  • because they had understood that in that way.

  • So,

  • with format of current schools,

  • it is passing through a moment where we

  • are feeling the anxiety and pain

  • that the system doesn't work here,

  • o in the US,

  • or England,

  • or Japan.

  • And there is a feeling until your 18 years old that thing is a torture.

  • And we are practicing that toture if really low

  • levels of success

  • and we fooling ourselves saying: the only we can is to recycle a little bit, put

  • more computers, etc.

  • A study from

  • OECD

  • showed

  • that with a linear research of 11 year that

  • the usage of computers

  • in the school doesn't make a small difference.

  • It makes ZERO difference!

  • It made 0 difference in their study per 11 years.

  • And we are fooling ourselves to believe

  • that we need to revitalize,

  • modernize a method that completely obsolete

  • It is like adding a new

  • 'engine' in an Opala (old Brazilian car)

  • 77

  • and then we keep polishing it... polish it here and there

  • and it will look beautiful.

  • There is something wrong!

  • The current model,

  • that is

  • a model of parallel knowledge that somebody will try to put it together

  • for a world that doesn't need it for today even less to when the kids graduate.

  • That indicates that

  • we need to start from scratch.

  • After

  • more or less 25, 30 years

  • building a system,

  • a way to deal with our company,

  • where we said, look,

  • why not force people to come work

  • and dress in a certain way

  • and make them learn to ask where they will be in X years and etc...

  • Long story short,

  • we tried to change that for

  • almost 30 years,

  • an experience that said:

  • you are adults, for god sake,

  • I don't want to count your days of work

  • your hours

  • and I don't even want to discuss how much you should earn,

  • I give you all the data

  • what is the salary here, what is the salary in other companies

  • how much a person higher or lower than you earns

  • how much we can pay

  • how much the company earns.

  • We will remove the obstacles, that are the same obstacle of reformatories,

  • those are the ways we have

  • and the unions are forced to require

  • and the city and state are forced to obey and

  • the teacher needs to.. and etc

  • What is the rule?

  • Why is he that position and I'm not?

  • Why was she promoted? Why she earned a bonus?

  • This creates a huge immobilization

  • that even makes you

  • stay in a reasonable

  • comfort zone,

  • but a zone where, internally, you can't feel hapy and fulfilled thinking

  • that is what I thought

  • when I decided

  • to become a teacher.

  • After a lot of years of that, and let's say, with it solidified

  • it became clear to me

  • that we are spending a significant part of the time

  • getting people that obeyed to that system since their two,

  • three years old to

  • stay quiet, 53 minutes, now it is this class or that, and etc

  • You have no options, your forced to that...

  • and the people becoming

  • 17 years old

  • we ask them: Well, boy, what do you want for your life?

  • What do you want to be?

  • You look today,

  • Miguel probably participated in a conference like that in

  • California. I went to one,

  • where they say with 100% sure

  • that the kids

  • at the age of my children, have a life expectancy,

  • (in our social class)

  • of 110 years.

  • 110 is what they are sure about

  • and not that you become useless at 80.

  • It is a time distribution.

  • With that age expectation,

  • we could have a school system that says

  • at 17 you are capable to chose to be an engineer, study that for 5 years,

  • of engineering,

  • spend 25 years as an engineer,

  • go back,

  • study 7 years of medicine

  • spend 20 years as a doctor

  • go back 5 years

  • become an architect for 20 years and also retire for 10.

  • Are we preparing people for that?

  • No way!

  • We are asking: do you want medicine? Yes! Ok. Which area?

  • Which part of the body? Is it the finger?

  • Because tomorrow you have to be specialized and that's your little box.

  • You are the finger dude.

  • Now if you ask at the same thing...

  • well... I know for example

  • a boy that teaches biology to

  • 17 years old.

  • He is

  • passioned,

  • a master and loves what he does,

  • but he has a serious problem,

  • 38% of the students

  • who graduates with him

  • wants to be Biologists.

  • You saw this effect already,

  • if you put a 16 or 17 years old kid

  • with a passioned person they will become violinists. 42% will want to be violinists.

  • Or a mechanic, right?!

  • If you bring a passioned to and put kids in front of him

  • things happen.

  • So, what we created

  • a foundation, an institute

  • and then a school, because

  • we thought that all this generic talk

  • wasn't product and wouldn't help anyone.

  • We came-up with a team

  • first thinking, let's rethink the school from scratch

  • let's assume

  • that everything that was done served it needs but we need a new model

  • and let's forget everything,

  • let's just remember the accumulated knowledge of the man kind

  • and let's create a new system.

  • And we created the Lumiar school

  • The Lumiar is an attempt to do that.

  • To make sure we weren't

  • reinventing the well or make crazy things we put together

  • around 20 people that met twice a week

  • and that group included

  • Cristovam Buarque (Senator with focus in Education)

  • Paulo Renato (Education Minister)

  • and Paulo Freire (PHD in Pedagogy with focuns on critical thinking).

  • So, we had people from the education field, to make sure

  • people didn't think, entrepreneur,

  • they messing with schools.

  • We had pediatrics, psychologists and tried to create a new model.

  • We thought,

  • what if we forget

  • everything you know so far or all your accumulated

  • baggage

  • from the school world

  • how could it be

  • that new school from zero?

  • And we came-up with three main pillars.

  • One is the figure of the teacher.

  • The way it is today it is today

  • is obsolete.

  • You are asking a person that

  • joined the profession

  • because of idealism to do

  • a bunch of different things. Like you saw here, in the presentation of

  • Marcos Magalhães about the school diretor

  • everybody got confused already,

  • he as to deal with parents, with union, etc

  • the mayor... of course it is not possible

  • The 'teacher' is not so different.

  • The teacher has to know

  • about his discipline

  • he has to have passion for it

  • he has to understand

  • how ti correlates with other disciplines

  • he needs to know how to control 30 kids who doesn't want to be there

  • he has to have

  • to be firm

  • but at the same time kind

  • he has to be interested in career plan. Wait, stop! Calm down!

  • This one is one in a million

  • and with time,

  • he also have to deal

  • with the union, that is taking care of his rights

  • against a somebody that doesn't want that, against the city and etc

  • and there's the secretary that wants to change everything

  • That world,

  • that function, is not viable.

  • So, how do you handle that?

  • You basically divide it in two. We did that.

  • We got the inspiration

  • from the Greek

  • idea of the tutor.

  • The tutor was basically who would (usually a slave)

  • take the student

  • to many different places

  • like the academy, the gym and etc

  • So, the role of

  • current teacher

  • is the role that fits the initial

  • idealism of the career.

  • The tutor,

  • in our system

  • takes care

  • of the person,

  • the kid,

  • from the emotional

  • point of view

  • cultural

  • check their real interests

  • and tries

  • to map

  • their education

  • and out-source

  • the process

  • of learning to a passioned person specific to the discipline

  • Basically, the teacher we have today becomes this tutor.

  • We have a real experience with that,

  • with the tutor,

  • adopting, not really adopting...

  • but assuming a public school and operating it like that for many years

  • the teachers we had there became the tutors

  • and the second role, the other half, let's say,

  • is what we call the master

  • it is a person who requires

  • two characteristics

  • a person who is

  • passioned,

  • expert in something,

  • if it is his job or a hobby doesn't matter

  • he has to be passioned

  • and also

  • understand the subject really well

  • This person can come from the outside of the school

  • could be from the comunity

  • or parent and etc.

  • The idea

  • is that we can notice

  • that with the population getting older

  • we are not finding any good usage

  • neither for the unemployed young people

  • neither for the retired ones

  • and are still capable to contribute.

  • So, in this format

  • we are coming back to something almost anthropological.

  • The people that are retired, many times too soon, can come back

  • and for a short time,

  • because nobody is gonna be volunteer for too long,

  • for two months

  • or four months, they can come to the school

  • and share

  • their knowledge and expertise we already discarded

  • as a society. We already told them we don't care.

  • If you are 62, or 58 and retired

  • you have to go back home to watch in pijamas.

  • We are saying, no! There's a place for you

  • here.

  • If you look

  • the distribution of time

  • during your life

  • you can notice, that we spend on average

  • 19 a 23% of our time studying

  • specially people like us

  • then you spend another 35 to 40%

  • of the time working

  • and the rest of the time retired

  • If you plot a chart

  • you can see that time,

  • amount of time you have,

  • is like an "U".

  • Amount of money?

  • It's like a bell

  • And health?

  • Is like a decreasing line.

  • So yo conclude that

  • when you have money, you don't have time to use it

  • and finally when you have time you don't have money and health.

  • That's how we design our lives

  • We used to have an interesting program in our company called retire

  • a little bit.

  • It was a program that said:

  • I'm gonna sell your Wednesdays

  • back

  • and since I'm not buying just time, I'm also buying your talent,

  • that's gonna cost 10% of you salary.

  • So, if you work Monday, Tuesday, Thursday and Friday, on Wednesday you do

  • whatever

  • you would do when you retire.

  • So instead of you be a climber at 81

  • you can do that at 32 years old.

  • That is a solution for this problem. We would give them a coupon

  • that said "when you retire I buy one day of your week"

  • to not let you die

  • intellectually. You keep coming here for the rest of your life

  • to bring wisdom, because it took you so long to create it and build intuition

  • and you are ready we trow you away

  • because you don't want to work 10 hours a day anymore.

  • So, following this line

  • for two months you bring that master

  • and you have a crazy amount of people interested in to come to the school

  • to talk

  • about the passions.

  • The third

  • pillar is

  • is what we can the mosaic.

  • Which means,

  • anthropologically

  • we all have

  • an idea in our heads, as members of a tribe,

  • of what we want from those kids, when they complete 18, to do with their lives

  • The mosaic represents that.

  • What we need.

  • Is it important that they know who is Picasso?

  • Or understand what is modern art?

  • If I put a canvas in the floor and trow a bucket of ink on top can I call that mondern art?

  • Is it explained?

  • It isn't? Why?

  • Well, you decide that and you have a mosaic

  • that goes from 2 to 18 years old

  • and I need, to minimally, expose the kids to that

  • Minimally.

  • Minimally does not include sine and cosine. It doesn't!

  • Then I have a spare time. I'm not just gonna their time just

  • because they are available. I'm gonna empower thair capacity to deal with the world,

  • and learn to learn by themselves

  • The idea

  • that is operative today, and is completely obsolete,

  • is that we need to make them memorize

  • because that's where they store the knowledge

  • but, in the mean time, someone came-up with that thing called Google

  • and you need to store anything more

  • but the schools doesn't noticed that.

  • We are saying, you have to understand, and memorize, and memorize

  • and repeat... You don't need to memorize or repeat. In 15 seconds Google will tell you.

  • You have to learn to find the information.

  • Know how it works

  • And use it in your favor

  • But simple recall?!

  • ... know dates and places?! No!

  • Generically understand how we got here and what are the way and etc is a different thing.

  • So we start with a teaching way that says: the disciplines as we know

  • are discarded

  • but what we need to explain about each of them is kept

  • if it is really important to know

  • addition and what a prime number we put that in

  • the mosaic and we'll find a way to do that

  • while the kid is in the school. But we ask what they are interested in.

  • And for example

  • they said

  • in the last year in a certain moment

  • that they were interest in the World Cup.

  • We said, well let's have a class about the world cup. How long? 2 Months

  • of world cup classes

  • Then you think, well, in the world cup am I gonna talk about Soccer?

  • The only thing I think we haven't talked about it was soccer.

  • We've talked about cramp for example

  • How somebody that

  • exercise for 7 hours per day has cramps?

  • Or geometry...

  • If you change the fields' geometry

  • and use a triangle instead does it still work?

  • How many Watts I need to light the stadium?

  • Why it took 71 years between

  • the invention of the soccer

  • and the electricity to

  • somebody think about a night game?

  • Why the humanity is so slow?

  • Why the humanity takes so long to learn anything?

  • In the world cup you can discuss why most of the dutch players

  • are black

  • and if their wives, that is immigrant,

  • goes to a hospital will she be taken care of or not?

  • Why there

  • 98%

  • of the births natural and just 1.2% are caesarean and in Brazil 28% are caesarean?

  • Those are all questions about the World Cup.

  • I can talk about history and geography

  • we can make a blog to talk about Portuguese, no problem.

  • We are making one now

  • this month called "Amy's class"

  • Amy Winehouse's class.

  • They are interested about it.

  • The kids go to class to learn about Amy Winehouse. But the class asks

  • things like:

  • How much is her wage?

  • How much is the label percentage?

  • How much she makes per show?

  • Without math they can't learn anything like that.

  • And then you ask: And when you get there and find a body?

  • What is formaldehyde?

  • What is rigor-mortiz?

  • What is cirrhosis?

  • What happens when you drink a lot of alcohol? Why you have hangover?

  • The kids are all interested and that is Chemistry and Biology

  • It is easy to teach Chemistry and Biology

  • in an Amy Winehouse's class

  • And then I go and say that a 4 by 4 beat

  • What is a 12 by 8 beat?

  • What is Rock? Why a blues singer to

  • be really good

  • has to be black?

  • What happens if put silicon in the breast?

  • What happens with the silicon after 10 years?

  • Can you see? I have Chemistry and Biology enough to teach all but using Amy Winehouse.

  • So they chose and have an interesting class to attend

  • They chose

  • but you can pick wherever you want and we can handle.

  • From math, geography to history

  • no problem.

  • And the mosaic,

  • which is a digital system that controls everything, we keep track the students progress/decisions

  • and we know from 2 to 18 years old what

  • caught their interests

  • and when they

  • turn 16 or 17

  • we can say

  • don't worry about vocation

  • you told us already

  • hundreds of times what interests you

  • we know what is your vocation

  • take a look here everything you did. And there is where you use computer software

  • to answer

  • and indicate that you can only be this or that in your life.

  • You chose that since 3, 4, 7 or 8 years old

  • This is your talent right here.

  • The digital mosaic says,

  • you stepped on Gregor Mendel

  • but how?

  • As a geneticist? Peas? Alright.

  • But there's also a Mendel that

  • that is mathematician

  • there's another Mendel about the theory of games

  • of

  • Fibonacci

  • there's Mendel, really interesting about Math

  • There is another Mendel

  • really important for the industrial history.

  • Who puts all these Mendels together? Nobody.

  • The system does that for us.

  • And we make this connections and say:

  • If you were interested in Mendel here and Picasso there

  • but also like the lyrics of Amy Winehouse there's rap here

  • and rap is Hip-Hop and Hip-Hop is Carlos Drumond de Andrade. The things get easy.

  • But you have to design all these things and that's what we are trying to do.

  • And the last thing,

  • of course, in a process like, we want you to come here because you want

  • and you should

  • decide a few things about the school. For example

  • We have a circle where we say, your rules to live together? You decide it.

  • It is not gonna be so different than ours.

  • You can hit each others head? Yes, you can. For how long?

  • One week?! Next week they don't want that anymore.

  • So the kids make a circle

  • and once a week they solve the problems

  • coexistence rules, problems with class, and etc

  • between them. We facilitate that a little bit

  • but they make the decisions.

  • Some times the kid that is

  • making the accusation

  • is the defendant of the same crime in a couple weeks.

  • This learning process about citizenship guided by themselves is more than enough

  • And in the first hour of everyday

  • in the schools

  • We do something we call "Reading the world"

  • Which is really simple,

  • It is one hour where you open the newspaper

  • or the Internet and chose one thing there to learn about

  • and everybody start to learn together, some of them prefer to learn in separate but

  • everyone is using the Google

  • to teach, to learn what happened

  • in England

  • with the guy that rapped the house-keeper.

  • Why that happened?

  • Those are questions that kids with 4 years old start to think about.

  • So, in general

  • that's all I would like to tell you.

  • That there's different formats but the formats now

  • have to go through a process of

  • deconstruction

  • of the obstacles that we created and not through just

  • marginal improvements

  • The public school we are running had an average of 43 points

  • in the first Brazilian Exam (national exam)

  • six months after and one year after,

  • and we are talking about sons of really poor people in a rural school,

  • where the parents'

  • average salary is 100 dollars,

  • is 96,15%

  • and it kept 96% 97% 94%

  • in the Brazilian Exam (national exam)

  • Without ever have seen the content of the exam before

  • Without ever memorized anything for that specific exam

  • And without nobody get "sick"

  • This format

  • is just, let's say,

  • a suggestion

  • to you that certainly came with idealism and is still because of that

  • and it's been

  • eroded by the

  • difficulties of implementation and the delay

  • and complexities,

  • to learn that there's a way, and I think there is,

  • for us and for everyone here

  • maybe a better way to do that.

  • Thank you.

On the subject of small and big revolutions in the schools we call to the stage Ricardo Semler.

Subtitles and vocabulary

Click the word to look it up Click the word to find further inforamtion about it