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
Chapter 5 Rule 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. Grade 1 / Chapter 6: Count and Model Numbers Lesson Action Details for the Action Rationale 6.1 Count by Ones to 120 As is 6.2 Count by Tens to 120 As is 6.3 Understand Tens and Ones Delete This lesson repeats the work of Lesson 3.7. 6.4 Make Tens and Ones As is 6.5 Tens As is 6.6 Tens and Ones to 50 As is 6.7 Tens and Ones to 100 As is 6.8 Show Numbers in Different Ways As is
6.8.1 Add Choose 5-6 problems from each lesson’s Practice Set as additional practice on the concepts addressed in Lesson 6.8: 1.NBT.B.2a and 1.NBT.B.3 are Major Work of Grade 1 and warrant more than a single lesson (6.8). 6.8.2 Add Choose 5-6 problems from each lesson’s Practice Set as additional practice on the concepts addressed in Lesson 6.8. 1.NBT.B.2a and 1.NBT.B.3 are Major Work of Grade 1 and warrant more than a single lesson (6.8). 6.9 Model, Read, and Write Numbers from 100 to 110 As is 6.10 Model, Read, and Write Numbers from 110 to 120 As is Chapter 6 Rule of Thumb Rationale Apply the global rule of thumb for general approach to vocabulary. In this chapter, emphasize correct meaning and use of key vocabulary: digits, value, place, and place value. Note: The concept of place value provides us with a way to write numbers in a succinct manner (i.e., instead of writing that I have 3 hundreds and 4 tens and 2 ones, I can write 342). In the number 342, the “3” is a digit; it is in the hundreds place, and it carries a value of 300. Deleted lesson makes specific reference to the term “digit.” This term should be used consistently and correctly throughout the chapter in the context of teaching and learning within the NBT domain.
Grade 1 / Chapter 8: Two-Digit Addition and Subtraction Lesson Action Details for the Action Rationale 8.1 Add and Subtract Within 20 Delete Students already did this work in chapters 3-5. It is confusing to call it a “lesson,” but can be used for practice. 8.2 Add Tens 8.3 Subtract Tens Modify Condense these lessons so there can be more of a focus on moving more quickly toward the work that is new in first grade. Emphasize the “relationship between addition and subtraction” by presenting them as connected topics (1.NBT.C.6). 8.4 Use a Hundred Chart to Add As is 8.5 Use Models to Add As is 8.6 Make Ten to Add Modify Extend this lesson to 2 days. Additional Resource: This is Major Work of the grade and the first time students have to compose ones to make a ten (1.NBT.C.4). 8.7 Use Place Value to Add As is 8.8 Addition Word Problems As is 8.9 Related Addition and Subtraction As is 8.10 Practice Addition and Subtraction As is Chapter 8 Rule of Thumb Rationale