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Student Instructions
1. Read the short recap and vocabulary. 2. Do the matching and sorting activities. 3. Answer the quiz questions and show your thinking on open tasks. 4. Pair with a classmate for the partner task and record your work. 5. Reflect with the poll at the end.
Teacher Notes (not visible to students)
This activity helps third graders practice rounding and using rounded numbers to estimate sums and differences. It reviews place-value rules and gives students multiple ways to show thinking: matching, sorting, short answers, and multimedia responses. Use the partner activity for speaking practice and the open-ended pages to assess reasoning. Prepare index cards with place-value labels (tens, hundreds, thousands) and some sample numbers for small group work. For open-ended answers, a high-quality response explains which place value the student rounded to, shows the rounded numbers, computes the estimated sum or difference, and states whether the estimate is reasonable compared to the exact answer. A correct short answer will show the rounded result and a simple check (e.g., comparing exact calculation or noting the estimate is close).
