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Teaching science: we’re doing it wrong | Danny Doucette | TEDxRiga


Translator: Maha Ghnimat Checker: Anwar Dafa-Alla
I am a high school teacher,
I’m not used to being the whole room listening to me.
(Laughter)
So, who among you enjoyed the science share at school?
Not bad.
Well, over the past week,
Which of you has tried something that you learned about physics?
In your daily life?
Well, there are some of you, but not much.
So I think I am a teacher
I do not have much influence on the lives of my students
This is a problem.
I would like to start by telling you a story about Zaya.
(Zaya) was a student in Mongolia seven years ago.
She was 14 at the time.
Zaya was a quiet girl and studied hard,
She also had a good relationship with her friends.
Zaya believed in the existence of space objects.
Her grandfather was claiming to have been kidnapped from space objects several times,
Ghandi is famous for his drawings and paintings about the kidnapping.
At the time I met her, Zaya started surfing the Internet
She began to look more for conspiracy theories.
With time I began to doubt
The local government and national government,
Even the world economy is being controlled by the dwarfs of Khadr.
That’s what happens
When you take a teenager did not learn how to think critically,
They offer internet access.
So, in today’s world we face serious challenges:
Global Warming and Progress in Health Care
Increasingly sophisticated technology.
In order for us as a society to deal with this,
We will need to erase the scientific illiteracy of the population.
At the same time
If you are a person who can use science and critical thinking in life,
You will have the ability to understand the world better.
But in the case of Zaya,
We, teachers, do not teach students how to think critically.
We do not know students
How they make scientific ideas meaningful in their lives.
Most of us know that we have to do things better,
But at the same time,
Most of our conversations focus on the wrong things.
That many people think
We can make children love science and achieve better results
Only if we show them
Many visual effects and explanations are enjoyable.
So let’s have fun explanations.
(clap)
I have here a vial, and a stimulating chemical here.
The bottle contains hydrogen peroxide as well as plain liquid.
I’ll get this here.
And we get this wonderful effect here.
What’s happening
Hydrogen peroxide is divided into parts by a chemical catalyst,
Water is converted into oxygen-free water.
Because there is clear liquid in the mixture,
The oxygen gas was limited to become bubbles,
So we get a bunch of bubbles.
In the next 10 minutes or so it will continue to explode.
In the hope that this will not do you much
What I am trying to say here.
Well, this is very cool,
But did it push you to become curious towards the world?
Did he make you wonder why the sky is blue,
Or how the car engine works,
Or why turtles possess unique patterns of snails?
No, not really.
What I mean, asking questions that way makes you curious, but I’m not sure
That this kind of explanation offers a lot to the students.
So that we can use explanations
To stimulate curiosity or to teach critical thinking,
These explanations are only misleading
In a world in which people need to learn how to think critically.
The second mistake we make
We believe that science belongs to the branch of knowledge.
Well, if science branch knowledge
So the responsibility of the school
Determine if students have learned this knowledge or not.
We have two tools to do that.
First, multiple choice questions.
Any color will best handle
In the optical telescope or in the microscope?
We have four wrong answers and one true.
What kind of power plants should we build to provide electricity?
Where there is no place for accuracy, explanations or explanations
How many chromosomes in humans?
There are no exceptional cases, just one answer.
None of these definitions are similar in syntax
The correct definition of energy?
Which is mostly a test of reading skills.
What is the nearest star?
You can not support a child’s ability to ask the right questions
Configure theory, do experiment,
Or give meaning to their lives by multiple choice questions.
Well, the other method posed scientific issues.
Scientific issues are called realistic positions
Where students are supposed to apply their scientific knowledge.
Here’s an example.
Mass 5 kg,
Acceleration 2 meters / second,
We know that force equals the mass of the body’s acceleration
So how much power is equal?
When students see such issues,
They say: “What law should I use?
What should I use?
What idea should I write on the paper? “
Then stop thinking.
These issues do not give a meaningful assessment
The ability of the child to apply his knowledge of science.
It does nothing but test
Whether students can solve this type of issue or not
So, the tests of science without interest are true?
so what?
The problem is that these tests act as bridges
We use it to make students graduate from school
We use it to make students enter the university, as we use it
To enable students to prepare for their working lives.
As a result, a great burden accumulates
Students, families, and teachers
To prepare students for these tests.
We focus on the wrong things, the wrong target tests.
If there is magic or meaning to science at the beginning of the school year,
It will go by December.
So, that’s the way things are.
Teaching science does not work.
We experiment with visual effects that have no effect,
And they passed children on exams that did not tell us anything meaningful.
I have another explanation for you.
it’s better.
This is an oddity box, please watch.
Now, when you see this, who has any question?
Who has curiosity about him?
Who wants to climb to the podium,
To pull one of these threads, and see what happens?
Yes, this is the reaction we want from our students!
We want them to have curiosity.
When I showed my students the Wonder Box they said, “Show us what’s inside!”
But I will never do that.
Of course, it is tightly sealed.
Science is like a box of wonders, not only revolves around the answer,
We have no entrance to some of the realities of the universe.
All we have is questions.
I told my students that they could go home and make their own wonder box
You can do that, too.
And if you do your wonder box like my box
So – congratulations! you passed.
But I will never see what is inside the box.
Such are the explanations of science, right?
But most of the science lessons we need are a bit harder
So, let us explain further.
I have a white magnetic ball here.
The white plastic ball does not attract copper
Not even the magnet can do it; Because copper is not a metal.
If we put the two in the tube
Plastic ball is here, but where is the magnet?
there he is.
So what happens?
While falling, a change occurs in the magnetic field of the tube
Just like in a dynamo or a generator
The change in the magnetic field creates an electrical charge.
Because the magnet falls linearly,
The magnetic current will be in the form of circles
These circuits are called Eddy currents.
Now, just as currents create magnetic field wires
Eddy’s currents create a magnetic field.
The magnetic field is here
It will be in the opposite direction
For the magnetic field
So, while falling,
The magnet is exposed to the resistance of the field indirectly
The result is that the magnet drops slowly.
But now, while you have seen clarification,
You heard an explanation,
And you saw some pictures, so you understand, right?
Well, let’s test your understanding.
Will take the magnet,
We will flip it up and down and then shoot it.
Will it be faster, slower, or will stay as fast?
Same speed.
So, the situation is complicated. Difficult.
Magnetic induction
When I studied it, I spent hours working with students.
We did some meaningful exercises, built models, and tried them out.
Understanding ideas in science teaching
It takes time, effort and of course to give instructions carefully.
The method I use in teaching is called modeling education.
Modeling stimulates the methods followed by scientists to discover knowledge
It is already successful.
I would like to show it to you.
First we start by experimenting.
Students have to find a relationship
Between specific variables.
Then we meet as a class,
We combine our findings to create a model.
But because the students created a model themselves,
Newton’s law of gravity is no longer called only
But the law of Anna, the law of Ivan, or the law of Alexander.
They have ownership of it, it belongs to them.
Then we take the model and apply it in real life.
Finally, we can take the model, ease the barriers
We believe that it no longer works.
Enabling us to find a new, more general model.
So, interactive learning theories like this work,
Research is clear.
It will take time and effort from us
To re-train teachers to study more effectively.
But the good part
It is not difficult, not expensive as well.
My favorite tools in the classroom are the smart board.
I bring the board to the classroom, the students bring intelligence.
When I ask my students to develop skills, I have to make them do something realistic
This ensures that they stay interactive.
Last week, my students brought a balloon of water,
They went to the second floor and grabbed it outside the window,
And they had to guess when they should throw the balloon,
As I walked under the window,
And head to head.
Let’s look at it.
(Video started)
Here we are … the fall
Hit the target.
(Laughter)
You can see how happy they are, right?
(Laughter) (Applause)
thank you.
Let’s go back to (Zaya).
Therefore, the suspicion (Zeia)
And its concerns about space objects.
What made her do it
Apply the scientific thinking you have learned in class
On her ideas about conspiracy theories.
As the year passed, I began to retreat from her views.
At the end of the year, a normal child returned.
Science and the way of thinking associated with it
I will prepare her for a better understanding of her world.
Imagine if we could get science classes
Students can learn to interact by sharing meaningful lessons.
Imagine if all of us can learn to think scientifically and critically.
But there is something missing, which is important.
the exams.
Here in Europe and around the world,
We increase the risk burden for the scheduled exams.
Every minute students spend learning how to ask questions.
How they conduct experiments, how they think as scientists,
Minutes not spent by students in preparation for the exam.
Any change we make to teach science
The beginning needs to change the science test.
There are several alternatives to these horrific examinations:
Projects, tasks, teamwork, laboratory experiments, files, optical labs.
If you are a science teacher, take it into account!
It has been tested, it has been tried,
These methods have existed for decades.
I do not know why people do not adopt these means, that’s crazy!
I am here to tell those responsible for the science curriculum,
Here and around the world,
To recalculate them with the scheduled examinations
It will test and seriously consider using alternative assessment methods.
But I have a message for you too, especially the students.
Science is much more than just tests.
If you can use science in your thinking
If you learn to think in a scientific and critical way
You will become a smarter and richer person.
We can learn scientific thinking, we can learn critical thinking,
So ask for it from the schools and the educational system
And ask him also of yourselves.
and, most importantly
Do not make the tests tell you what you care about and do not care about.
Learning science is difficult, but it is really important.
I think we’re doing it the wrong way, I think you can do the best.
In fact, I think we should do better.
Thank you very much.
( clap )
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