The lesson focuses on 2.OA.1 as students add using number strings. Students discuss and share strategies for thinking.
Adding with Number Strings (Waldron)Download
3A: Students share their thinking and strategy of problem solving to peers. Students agree or disagree with peer and ask questions.
2C: After a student shares her solution method, she asks the class if
someone else has another method. Another students explains how she got
3G: Teacher asks for answer to word problem. She asks if anyone else got a
different answer. Two answers were given. Students discuss how they
solved the problem. The teacher asks if someone wants to revise their
answer. The student revises her answer after discussing with peer.