We are in the middle of a unit on place value in second grade. The warm-ups this week took on a little bit of a different spin, as a couple of times kiddos were expected to finish up work from the previous day’s Math Workshop. That then became how we started math groups later in the day (I hope that last sentence wasn’t confusing…).
Monday
On this day, we were working on modeling numbers in bundles of 100s, 10s and 1s, like we had done during our place value challenge the week before.
Lesson 2 Problem Set:
Tuesday
Pretty exciting question, huh? See the example of what this page looked like below the picture.
Thursday
On Tuesday during math we had been focusing on representing a number in many ways, so I gave them a quick one to remind them of word form and expanded form.
Friday
Another one….we also practiced the word numeral for number form, as well as focusing on making sure our numbers go the right way (as we still have some friends who forget. 🙂 ).
20somethingkids and 1kookyteacher 
Great way to get your students thinking and explaining their thinking.
Love how these can be adapted to whatever we’re learning, and the procedure is so second-nature now because we’ve done it for a whole year together. So much bang for our learning buck! 🙂