Today was m&m's and percents, and percent errors. It was the first out-of-the box thing I've done with this particular class, and their response was enthusiastic but iffy in the effectiveness department. It made me think of a day last year when I was whining to my principal about a particular set of punks not being able to handle a less-structured task. She said, "That's why they so badly need to do more of them!"
I thought this was fun: One group found a half-candy. I thought it would make for at least a minute of discussion about how to handle it. Count it as a candy? Discard it as not part of the experiment? But all four of them looked at me like i was crazy and wrote down 49.5
This was, by far, my favorite part. One of the students noticed a mathematical anomaly ... soon several had appeared around the room.
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