2.6 As is Subtract to Compare 2.7 As is Subtract All or Zero 2.8 As is Take Apart Numbers 2.9 As is Subtraction from 10 or Less Rationale Chapter 2 Rules of Thumb Use bar models and/or number bonds first as a way to illustrate the concept of The Standards do not require students to be able to use these representations specifically. To be aligned to the standards in and then as a support for students who require it as part of normal classroom the OA domain, students should be encouraged to develop the differentiation strategies. That is, gradually let students take ownership of the representation(s) that help them achieve the central concern of representations they choose to use for solving problems. the standard(s) instead of being given a particular representation. Where directions to students provide excessive scaffolding, present problems without the The scaffolding undermines the goal of 1.OA.A.1. directions. (See for example, Chapter 2, Lesson 2, “On Your Own.”) Grade 1 / Chapter 3: Addition Strategies Lesson Action Details for the Action Rationale
2.6 Subtract to Compare As is 2.7 Subtract All or Zero As is 2.8 Take Apart Numbers As is 2.9 Subtraction from 10 or Less As is Chapter 2 Rules of Thumb Rationale Use bar models and/or number bonds first as a way to illustrate the concept of and then as a support for students who require it as part of normal classroom differentiation strategies. That is, gradually let students take ownership of the representations they choose to use for solving problems. The Standards do not require students to be able to use these representations specifically. To be aligned to the standards in the OA domain, students should be encouraged to develop the representation(s) that help them achieve the central concern of the standard(s) instead of being given a particular representation. Where directions to students provide excessive scaffolding, present problems without the directions. (See for example, Chapter 2, Lesson 2, “On Your Own.”) The scaffolding undermines the goal of 1.OA.A.1. Grade 1 / Chapter 3: Addition Strategies Lesson Action Details for the Action Rationale
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