Friday, September 20, 2013

Counting Project - Starting on The Big Set!

The counting project continues! Now that students in our class have had many opportunities to count different sets of objects in different ways we have moved on to our class project: deciding how to count our class set of unifix cubes (we have over 1,000). We began by pulling out our two large tubs of unifix cubes and having a discussion about different ways we could count them all. We decided, after all of our other counting work, that grouping and organizing before we count would help us to count more quickly, keep track of our counting, and give us a quick way to check our answer if we need to. The class decided on grouping unifix cubes in 10s, since we all know how to count by 10. Students set to work creating sets of 10 cubes, then putting each group into a small ziploc bag. Some of our students decided that we have several hundred cubes all together, so, after grouping all of our cubes in bags of 10, we had to decide how to proceed! Since we decided that only some of us know how to count by 10 beyond 100, we needed to choose another way to group. After discussion, students realized that they know how to count by 100 and that we could easily make groups of 100 by putting 10 small bags of 10 into a large bag. Yesterday students worked with partners to create groups of 100 in this way. Today during math time we will decide what to do next! Here are some photos of our process.


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