Reflection about English Lesson

Reflection 5

LEARN ENGLISH BY WATCH SOME VIDEOS

Monday, March 25th, 2013 at D02.105. My class, Mathematics Education 2012 meets again with Mr. Marsigit. Today, we watch video again in his lesson. There are seven videos that we watch today and not all of it is about mathematics.

First Video

This first video is about Quadratic Equation. This video shows the example of multiplication between the two equations that result in a quadratic equation, such as

(3x-1)(x+2)   =   3x²+6x-x+2

            y        =   3x²+5x+2

The name of Quadratic comes from "quad" meaning square, because the variable gets squared (like x²). It is also called an "Equation of Degree 2" (because of the "2" on the x). And standard form for a quadratic equation is y=ax²+bx+c with a, b and c are known values and a also can't be 0. "x" is the variable or unknown. For the example y=3x²+5x+2 with a=3, b=5, and c=2.

Besides there is a quadratic equation, there is also a linear equation. This equation’s form is y=mx+b or y=bx+c. In this form, m called as slope and b called as y-intercept. A linear equation is an equation for a straight line, for example y=x+3. And this is the graph for y=x+3.

Back to the quadratic equation. This equation also has graph and the graph of quadratic equation is parabola, for example graph for quadratic equation y=100-16x². The graph for this equation is

At x=0, y=100

At x=1, y=100-16=84

At x=2, y=100-64=36 and so on.

Second Video

This second video is about Inequality. Inequality is an expression that is unbalanced, for example 5>3 and 4<7. For the simple example, this video shows about a boy and his friend that playing the seesaw and their weights are equal, so the seesaw will form a straight line. And when the boy’s friend gets up, the boy falls to the ground because boy’s friend weight is greater than the weight on the other side. This position shows an unbalanced. Then, another friend coming to the boy and this friend is fatter than the boy, so boy’s weight less than his friend’s.

The following are signs of inequality, such as :

< less than, like 3 < 5

> greater than, like 6 >2 and 9 > 8

Third video

This third video is about Intersection. This video shows that there are two runners who ran in parallel, so that at any time until they will never form an intersection. Intersection form when lines cross over (have some common point).

	Line parallel doesn’t have intersection.

 

Fourth video

This fourth video is about Do You Believe. This video shows about statements of a boy, Dalton Sherman who was still 5th grade and 10 years old. He said about believe. He says that an adults or teachers must believe in the children because children need an adult to believe in them that they can reach a high potential. And it is very important to them.

This is text of Dalton Sherman’s speech to Dallas Independent School District teachers :

“I believe in me. Do you believe in me?

Do you believe I can stand up here, fearless, and talk to all 20,000 of you?

Hey, Charles Rice Learning Center – do you believe in me?

That’s right – they do.

Because here’s the deal: I can do anything, be anything, create anything, dream anything, become anything – because you believe in me. And it rubs off on me.

Let me ask you a question, Dallas ISD.

Do you believe in my classmates?

Do you believe that every single one of us can graduate ready for college or the workplace?

You better. Because next week, we’re all showing up in your schools – all 157,000 of us – and what we need from you is to believe that we can reach our highest potential.

No matter where we come from, whether it’s sunny South Dallas, whether its Pleasant Grove, whether its Oak Cliff or North Dallas or West Dallas or wherever, you better not give up on us. No, you better not.

Because, as you know, in some cases, you’re all we’ve got. You’re the ones who feed us, who wipe our tears, who hold our hands or hug us when we need it. You’re the ones who love us when sometimes it feels like no else does – and when we need it the most.

Don’t give up on my classmates.

Do you believe in your colleagues?

I hope so. They came to your school because they wanted to make a difference, too. Believe in them, trust them and lean on them when times get tough – and we all know, we kids can sometimes make it tough.

Am I right?

Can I get an Amen?

So, whether you’re a counselor or a librarian, a teacher assistant or work in the front office, whether you serve up meals in the cafeteria or keep the halls clean, or whether you’re a teacher or a principal, we need you!

Please, believe in your colleagues, and they’ll believe in you.

Do you believe in yourself? Do you believe that what you’re doing is shaping not just my generation, but that of my children – and my children’s children?

There’s probably easier ways to make a living, but I want to tell you, on behalf of all of the students in Dallas, we need you. We need you now more than ever.

Believe in yourself.

Finally, do you believe that every child in Dallas needs to be ready for college or the workplace? Do you believe that Dallas students can achieve?

We need you, ladies and gentlemen. We need you to know that what you are doing is the most important job in the city today. We need you to believe in us, in your colleagues, in yourselves and in our goals.

If you don’t believe – well, I’m not going there.

I want to thank you for what you do – for me and for so many others.

Do you believe in me? Because I believe in me. And you helped me get to where I am today.

Thank you.”

Fifth Video

The fifth video is about Dead Poets Society. This video tells us about an English Lecturer in the university. The English Lecturer always try to makes his lesson become communicate. He often calls name of his student to get notice from them. He also knows how to make his lesson interesting. He is a good motivator and facilitator for his students, such as we watch in this video. When he was teaching, suddenly he up on his desk and said to his students that they must try to look at things in different way. He also invites his students to try up on his desk, look around of them, and think about something. He did that so his students can get their own voice, their own English.

Sixth Video

The sixth video is about Solving Differential Equation. This video shows us about find y=f(x) and satisfies the equation for all values of x and y. Solve for the dependent variable, usually y. And this is the way to solving differential equation :

                       Trying to get dependent variable, y, all by itself

   Multiplying two sides with “dx”

               Integrate the whole equation

              

Don’t forget to C. In this equation, C is a constant that represent the infinite family of solution curves for the equation. We can change C with a Real number. And this is graph for the equation

Seventh Video

The seventh video talks about Inverse Function. This lesson begins with an explanation of the following :

F(x,y) = 0

Function y=f(x)   : VLT

Function x=g(y)  : HLT (Invertible)

The example to inverse function is  .

And here's how to find the inverse :

We multiply both sides by x +2, so produce the equation like this

 

So, we can find that  and

            In this video, this lesson taught by a presenter. And as a presenter, he smart in mathematics. In this mathematics, he explains smoothly, but it is not good because he kept talking without notice his student. So, he doesn’t smart for a presenter become a teacher. He should communicate with his student. Without communicate, there is no teaching and learning process. And now, the teacher should give the students chance to be active in the teaching and learning process.