We learned many things about Growing with Mathematics on our visit to Redding yesterday (1/9/07). We watched lesson 5.8 and 5.9. Below is a description of lesson 5.8.
During lesson 5.8 (Adding Two-Digit Numbers), the teacher did a great job of showing the students that there were MANY ways to solve the given addition problems. This lesson clearly built upon prior knowledge of addition.
The part of the lesson that I liked the best was that when the teacher asked for student answers, she had the students give the answer and then each student had to talk about the strategy used and the steps followed to solve the problem. The students in her class used at least six different strategies for solving two-digit addition problems. Some examples were:
- Hundreds chart
- Number Line
- Adding columns from right to left
- Adding columns from left to right
- Base-ten Blocks
- Coins... this is the one that I found most interesting. One student asked the teacher if she could add 52 and 35 together using coins. I had never seen a student do this before. The student drew the two quarters and two pennies for the 52 and drew a quarter and a dime for the 35. She then added the three quarters together and knew this was 75. Then she added on the dime (85) then added the two pennies for a total of 87.
This student truly exhibited a great number sense.
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