Classroom Reflection IV (from english lesson on March 11th, 2013 with Mr. Marsigit)

In our lesson that day, Mr. Marsigit show us some videos that related to english mathematics. The first video is video entitled ‘What you know about math’. There is a song inside the video, and the lyrics is as follows :

What you know about math?

What you know about math?
What you know about math?
What you know about math?

Hey, don’t you know I represent Math League

when I add shorty subtract
Freshmen backpack where I’m holding all my work at

What you know about math?
What you know about math?
What you know about math?

I know all about math

Answers 44
It’s real easy cuz of sig figs
You got 45 you rounded high
Your answers too big

What you know about math?
What you know about math?
What you know about math?

I know all about math
TI-84
Solar Edition you know I’m shining dawg
Extra memory, I look back to do my natural log
You know we multiply
while memorizing pi
take limits to the sky
be sure to simplify
graphing utility
that’s trinonometry
One hundred I’m math b
dont you cheat off me
distance is rate times time
the sine graph aint a line
exponential decline
but your score cant beat mine

We’re memorizing grades
for our mathly states
against the mathly greats
not getting many dates
I got to find a mate
but girls just playa hate
and always make me wait (can’t even integrate)
Dont you know I represent Math League

when I add shorty subtract
freshmen backpack where I’m holding all my work at

What you know about math?
What you know about math?
What you know about math?

I know all about math

            After playing that video, Mr. Marsigit show us a video about degrees. The video told us that degrees are measured by one full counterclockwise rotation. 360^o is equal to one revolution of minute hand in a counterclockwise, so that 1^o is equal to 1 over 360 full revolution. 90^o is equal to one over four full revolution, this angle also called right angle. And then we also already know about another degree measurement that called straight angle that have measure of its angle is 180^o or equal to half of the full revolution of counterclockwise. Beside that, the video also told us about other unit that we can use to measure angle, that unit is called radian. It uses radius of a circle to measure the angle. The video told us how to convert radians into degree and vise verse. In the degree unit, one full revolution is equal to 360^o, in the radian, one full revolution is equal to 2π radians, so that 360^o is equal to 2π radians. And then we can get 180^o is equal to π radian, so that 1^o = π/180^o  radian, we can use it to convert degrees to radians. On the other side, we will get 1 radian = 180^o/ π that we can use to convert from radian to degree.

            The next video is about limit by inspection. That video told us about how to use inspection  to determine the limit. Inspection can be used whenever the form of the limit is c/0 with c ≠ 0. That is, inspection can be used whenever the denominator is going to 0 and the numerator is not going to 0. Inspection cannot be used when the limit has the form 0/0. Beside that Inspection also can be used whenever a limit has the form c over ±∞ with  c ≠ ±∞. That is, inspection can be used whenever the denominator goes to either ∞ or - ∞  and the numerator goes to a particular number not ±∞.

            The fourth video is video entitled Golden X. The video told us about how to find the X in equation with shortcut method. That video just show about how to find X in equation through some method like adding any constanta.

            And then, the fifth video is a video about integers. The video told us that integers are whole number and its negative form. In other word, integers can be positive, negative or zero, but integers cant be decimal or fraction. The easiest way to visualize the integers is to put them in the number line. The number of the number line have no end or in the other word it is called infinity. Integers made up from digits, and every digit goes in a certain place. The first number in the integer is unit place (last digit), move to the left we will meet the tens place, and then the hundreds place, thousand place, ten thousands place, hundred thousands place and so on.

       The sixth video is about multiplying exponent. From the video, we can learn that when multiplying exponents, the only requirement is that the bases of the exponential expressions have to be the same. To multiply powers of the same base, add the exponents together: x^a × x^b = x^a+b . If there’s more than one base in an expression with powers, you can combine the numbers with the same bases, find the values, and then write them all together. For example, x^a × y^c × x^b × y^d= x^a+b × y^c+d .

         The last video is about function. The video told us that function terminology is algebraic statement that have 2 or more variable that have relation between each other. Relation is a numerical expression in equation or inequality. For example, we have variable x and y, then if we know x that’s mean we can find y. If we want to find the value of some equation that have more than one equation for example x and y, without x we can’t find y, and if we already to know the value of x we have to made y by itself.

            In my opinion, many of videos that we have watched still represent about traditional way of teaching because on that videos we just watched someone talking and explaining. But some of them has its own interesting part.