Thursday, December 10, 2009

Express Yourself in Words!!!

Often times in math, once you've solved the problem and have an answer, you move on without giving an explanation as to why your answer makes sense. Sometimes we get too caught up in just the numerical answer that we are looking for.

It's not very easy to show your work on the computer screen. So, when you are assigned a problem on the blog you'll have to be able to communicate your answer in words. You should include the math language and skills that we've been learning and practicing in class recently. As always see if you can make connections to other situations where the same math could be used.

You will be scored on a 3, 2, 1, or 0 scale.
Example of what’s expected for these assignments:

Problem –
Field Trip – The 7th grade math classes are going on a field trip. The field trip will cost $7 per student. Write an expression to find the cost of the trip for s students. What is the total cost if 26 students go on the trip?


To earn a “3” on this problem, I would expect…
Let s = number of students on trip.
Let 7s = total cost in dollars of trip.
7s; s=26
7*26 = $182

The total cost of 26 students to go on the trip would be $182.

I started with the variable that was given to build the expression. Then I substituted in for the variable into my expression the number of students who were going on the trip. I then was able to solve the expression to find the total cost.




To earn a “2” on this problem, I would expect…

Let s = number of students on trip.
Let 7s = total cost in dollars of trip.
7*26 = $182

The total cost of 26 students to go on the trip would be $182.

I wrote the expression and then substituted in for the variable the number of students who were going on the trip and got my answer.



To earn a “1” on this problem, I would expect…
Let 7s = total cost in dollars of trip.
7*26 = $182

The total cost of 26 students to go on the trip would be $182.




To earn a “0” you have not completed the assignment.

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