Related FactsUnit of Study: More Addition & Subtraction StrategiesGlobal Concept Guide: 1 of 3

Content Development

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: 17 + 3 = 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. 201 - 204

Day 3 Illuminations - Do it with Dominoes Lesson 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

Literature for your Classroom Library