Before You Begin this Unit…  Unit at a Glance  
Students are returning to multiplication with experiences in skip counting and making arrays. This unit assumes that students understand that multiplication involves equal groups. In this unit, students use arrays to build, decompose, and analyze numbers. This unit also supports students’ work in relating division to multiplication in order to reason about and solve problems. Session 2.2
involves preparing sets of Multiplication Cards for students. This
lesson helps students take ownership in learning the facts they don’t
know. Consider ways your kids may use these cards to learn the facts
they don’t know after you have taught this lesson. 
Suggested Dates: August 25September 12 Estimated Duration: *Investigation 1: 5 lessons (Including 1.6A, combine 1.2 and 1.3) *Investigation 2: 4 lessons (combine 2.4 and 2.5) *Investigation 3: 4 lessons (3.13.4) 

Standards Addressed in the Unit  
4.OA.1 Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 x 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5. Represent verbal statements of multiplicative comparisons as multiplication equations. 4.OA.2 Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison. 4.OA.3 Solve multistep word problems posed with whole numbers and having wholenumber answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding. 4.OA.4 Find all factor pairs for a whole number in the range 1–100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1–100 is a multiple of a given onedigit number. Determine whether a given whole number in the range 1–100 is prime or composite. Link to the CCSS Unpacking Document Updated Sept. '15 