Related Facts Unit of Study: More Addition & Subtraction Strategies Global Concept Guide: 1 of 3

Content Development

 Students are exploring facts and how they are related through hands-on activities and acting out problem situations.  It’s important to help students build a deeper understanding about how the facts relate rather than simply filling in a blank with a number.  Example: = 20, 20 – 17 = ____. Students should be able to justify why 3 is the answer to the second fact in relation to what they know about the first fact. It is not enough for them to say “I know 3 is the answer because it’s the other number”.

Day 1  Go Math Lesson 5.2 Record Related Facts  Listen and Draw on p. 5 – students will build models using 2 different color snap cubes  Discuss the relationship between the addition and subtraction problems  Go Math Lesson 5.3 Identify Fact Families  Focus on Model and Draw p.194  HOT question #14 on p. 196

Day 2  Excursions: All Aboard  In this lesson, children investigate fact families. They begin by cutting out numeral and operation symbol train cards and make fact family trains. Then they continue with snap-cube modeling and the recording of number sentences. Pairs roll dice to find addends and record their fact family.  Go Math Lesson 5.5 Algebra - Missing Numbers  P

Day 3  Illuminations - Do it with Dominoes Lesson 6: Finding Fact FamiliesLesson 6: Finding Fact Families  Read the book Ten Sly Piranhas. Students listen to the story and act out the situations with 2-color counters, writing the number sentence to match.  Students then find a domino that shows the related fact and write the related fact.  Go Math Lesson 5.6 Algebra – Use Related Facts  p. 205 – 208  Additional Practice  Triangular Fact Cards (Mountain Cards from Go Math kit)  Students use cards to write related facts  Use as an independent, partner or a center task (TE p. 205B Tier 2 Intervention)

Enrich/Reteach/Intervention  Reteach/Intervention  Go Math: Chapter 5 TE p. 193B Tier 2 Intervention  Go Math: Chapter 5 TE p. 205B Tier 1 Intervention  Go Math: Chapter 5 R41 – use 2-color counters to model related facts  Enrich  Go Math: Chapter 5 E41 - students write the missing number to solve the riddle and then 2 related facts  Using triangle fact cards (Mountain Cards), students draw a bar model to represent the related facts.  Cuisenaire Rod and Triangle Card Related Fact Building Cuisenaire Rod and Triangle Card Related Fact Building

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