Looking at Quizzes- Part 2 … How are we doing?

Quiz 2, Trimester 2, as a Word Document:

Question #1: Fractions.  Everyone was able to solve this problem correctly!  This is huge. Fractions matter.

Students are  still learning to simplify their answers, but that will come with practice. They can see the equivalencies on their fraction templates.

Good drawings. Remember to check whether you can simplify.

Question #2: Multiplication.  Almost everyone got these  problems correct, too.   The diamonds are mildly challenging, and involve multiplication practice for those who need it.

Question #3: Area Model.  85% got this correct. Some got blocks to check during the quiz. Our hope is that simple 2-digit problems can soon be done mentally. The top row of this drawing equals 280 (28×10), plus the 28 below it.  280 + 20 + 8 = 308.

 

Question #4 Multiply/Divide by 10, 100.  About 2/3 got this correct at this point. A handful of students still haven’t processed the concept adequately. (See 3rd example, below). To remediate, struggling students absolutely need to use blocks to see what’s happening, and then record it. Nothing is as effective as what they can see, using blocks. They also need to talk about what’s happening as they exchange the blocks. For example, “1 times 100 means the one morphs from a single block into a 100-flat. Now it’s in the 100’s column. It moved 2 place values bigger.”

Correct
This student got it right except for the thousands place in #4. Five times three is 15, not 25. It’s interesting that she is still using blocks to make sense of it – good job!

 

This student needs to get base 10 blocks and build the changes. It may take 10 or 15 practice problems with the blocks before it truly clicks. Some students barely need to build, others need to build a LOT. We take them where they are. 

 

Question #5 Challenge.  About half of the students got (a) and (b) correct at this point.

Only 5  students got (c) correct – it’s challenging. Long method: it would be possible to put 47 dots in the column on the right, then exchange them  5 at a time for one in the next column. Short method: Since each column is 5 times as large as the last, they are labeled  25, 5 and 1.

Correct

 

One 25, four 5’s, and 2 ones make 47. 

 

 

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