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Math Unit Lesson Plan Grade Level: Second Grade Topic 8: Adding Two-Digit Numbers Common Core Standards: Instructional Emphasis: Big Ideas: Essential Questions: Numbers and Operations in Base Ten 2.NBT.5; 2.NBT.6; 2.NBT.9; 2.MB.6; 2.OA.1 How can you use models to add a one-digit number to a two-digit number? How can you model and record adding a one-digit number to a two-digit number? How can you use paper and pencil to add one-digit numbers to two-digit numbers? How can you use place-value models and the standard algorithm to add a two-digit number to a two-digit number? How can you use paper and pencil and the standard algorithm to add a two-digit number to another two-digit number? How do you use a number line to show addition? Can you add three or four numbers in any order? How do the addends determine the choice of adding methods? How can you solve a problem using pictures and number sentences? Day 3: Day 4: Day 5: Adding Two- and One-Digit Models to Add Two-Digit Adding Two-Digit Numbers Numbers Numbers Vocabulary: Vocabulary: Vocabulary: 1: 10 ones can be regrouped for 1 ten. 2 & 3: The standard addition algorithm for two-digit and one-digit numbers breaks the calculation into simpler calculations using place value, starting with the ones and then the tens. Answers to the simpler calculations are used to give the final sum. 4 & 5: The standard algorithm for adding two-digit and two-digit numbers is just and extension of the algorithm for adding two-digit and two-digit numbers. The ones are added first and then the tens. 6: Sums can be represented as lengths on a number line diagram of addition. 7: Three and four two-digit numbers can be grouped and added in any order. 8: All sums and differences can be found using models (cubes). Some calculations are done easily using mental math or paper and pencil. More complex calculations can be done using a calculator. 9: Information in a problem can often be shown using a diagram to solve the problem. Some problems can be solved by writing and completing a number sentence or equation. Day 1: Regrouping 10 Ones for 1 Ten Vocabulary: regroup Objective: Children will use models to add a one-digit number to a two-digit number. Materials: Lesson 5.1 Base 10 blocks iPad base 10 app Content Reviewed: Order Numbers to 99; Find the Number After; Write an Addition Sentence; Adding Ones Day 2: Models to Add Two- and One-Digit Numbers Vocabulary: Objective: Children will use concrete models to add a one-digit number to a two-digit number and decided if regrouping is needed. Materials: Lesson 5.2 Base 10 blocks iPad base 10 app Content Reviewed: Add 2 Two-Digit Numbers; Decide Whether to Regroup; Add Tens; Add Doubles Objective: Children will add a one-digit number to a two-digit number, regroup if necessary, and record the process in a vertical addition. Materials: Lesson 5.2 Base 10 blocks iPad base 10 app Content Reviewed: Find a Difference Mentally; Complete a Number Pattern; Decide Whether to Created by M. Skazinski 2013-2014 Objective: Children will use place-value models and the standard algorithm to add 2 two-digit numbers. Materials: Lesson 5.2 Base 10 blocks iPad base 10 app Content Reviewed: Odd and Even Numbers; Identify Number Names; Add Two- and One-Digit Numbers; Solve an Addition Problem Objective: Children will use the standard algorithm symbolically to add twodigit numbers, with and without regrouping. Materials: Lesson 5.2 Base 10 blocks iPad base 10 app Content Reviewed: Add Two- and One-Digit Numbers; Find Patterns; Add Three Numbers Standard: 2.NBT.5; 2.NBT.9 Standard: 2.NBT.3; 2.NBT.9 Regroup; Missing or Extra Information Standard: 2.NBT.5; 2.NBT.9 Assessment Topic 8 Introduction Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework Day 6: Adding on a Number Line Vocabulary: number line Objective: Children will use number lines to model two-digit addition Materials: Notebook Content Reviewed: Find Related Addition Facts; Names for Numbers to 99; Write a Repeated Addition Sentence; Mental Addition of Two-Digit Numbers Standard: 2.MD.6; 2.NBT.5; 2.NBT.6; 2.NBT.9 Assessment Assessment Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework Day 7: Adding More Than Two Numbers Assessment Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework 2.NBT.5; 2.NBT.6; 2.NBT.9 Assessment Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework Vocabulary: Vocabulary: Day 9: Problem Solving: Draw a Picture and Write a Number Sentence Vocabulary: Objective: Children will use paper and pencil to add 3 and 4 twodigit numbers. Objective: Children will use different methods to help them solve addition problems. Objective: Children will draw pictures and write number sentences to solve addition problems. Materials: Number Cubes Materials: Lesson 5.2 Base 10 blocks iPad base 10 app Materials: Lesson 5.2 Base 10 blocks iPad base 10 app Content Reviewed: Add Two-Digit Numbers; Order Two-Digit Numbers; Decide Whether to Regroup; Add on a Number Line Content Reviewed: Find Number Patterns; Compare Numbers to 99; Add 3 Two-Digit Numbers Content Reviewed: Mentally Compute Sums; Add Two-Digit Numbers; Find the Nearest Ten; Add Two-Digit Numbers Standard: 2.NBT.6; 2.NBT.5; 2.NBT.9 Day 8: Ways to Add Standard: Standard: Standard: Standard: 2.NBT.5; 2.OA.1 2.NBT.5; 2.NBT.6; 2.NBT.9 Assessment Assessment Created by M. Skazinski 2013-2014 Assessment 2.NBT.5; 2.NBT.6; 2.NBT.9 Assessment Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework Created by M. Skazinski 2013-2014 Daily Common Core Review Problem-Based Interactive Learning Guided Practice Independent Practice Problem Solving Quick Check Master Center Activity Reteaching, Practice, and Enrichment Homework Topic 8 Assessment