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10 Less, 10 More

10 Less, 10 More. Unit of Study: Comparing Numbers Global Concept Guide: 3 of 3. Content Development. Day 1. Building Conceptual Knowledge – Voyages Grade 1 Excursions To 100 TE p. 91 - 92 Introduce the lesson with the Setting the Stage section using the student p. 141

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10 Less, 10 More

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  1. 10 Less, 10 More Unit of Study: Comparing Numbers Global Concept Guide: 3 of 3

  2. Content Development

  3. Day 1 • Building Conceptual Knowledge – Voyages Grade 1 Excursions To 100 TE p. 91 - 92 • Introduce the lesson with the Setting the Stage section using the student p. 141 • Continue with Building Conceptual Knowledge– Using the Hundreds Chart to Add and Subtract and Adding and Subtracting 10 • Focus the lesson on seeing the patterns on the hundreds chart rather than on the addition and subtraction of the numbers. • End the lesson at the top of p. 92 in the TE, before Add and Subtract 20. • Exit Ticket – Hundreds Chart • Students show what they know about 10 more and 10 less on a hundreds chart by filling in missing numbers

  4. Day 2 • Building Conceptual Knowledge – Go Math Lesson 7.5 • Each student uses base-10 blocks (rods and unit cubes) model and solve the riddle. • Make up additional riddles for students to solve on white boards or in math notebooks • Facilitate discussion to allow the students to make the connection that only the tens place changes when counting 10 more or 10 less • Discuss the term “mental math” • Independent Practice – Go Math Lesson 7.5 #9 – 16 on p. 307 and #19 & 20 on p. 308 • Encourage students to complete these problems mentally • Ask them questions about their thinking to assess their understanding • Exit Ticket – 10 More 10 Less

  5. Enrich/Reteach/Intervention • Reteach/Intervention • Adding Sets of 10 – start with 14 and use base ten blocks to add 10. Record and look at patterns. Modify to include 10 less. (located near bottom of web page under 1.NBT4) • Enrich • Go Math Chapter 7 E60 – students solve riddles using 10 less and 10 more

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