UNIT PREPARATION

Display the Math Practices page where all students can see it.

If you have not done so already, attach Small Multiplication Tables to students' desks for reference. (See Unit 4.)

Gather one four-function calculator that does not use the order of operations and one scientific calculator that does use the order of operations. (See Lesson 1 Before the Lesson.)

Gather several stop watches or be sure a clock with a second hand is on display in your classroom.

Locate one set of Digit Cards 0–9 for each student (from Unit 6 or prepare the Master in Lesson 8).

Students will need the following tools readily available for the Daily Practice and Problems items in this unit:

LESSON SESSIONS DESCRIPTION SUPPLIES

LESSON 1

Order of Operations

 2 Students learn the conventional order of operations for addition, subtraction, multiplication, and division, including parentheses. A game, Operation Target, provides practice with this order and with basic math facts.
  • scientific calculators
  • four-function calculator

LESSON 2

Divisibility Rules

 2 Students explore ways to determine whether a multidigit number is divisible by 2, 3, 5, 6, 9, or 10. Being able to tell whether a number is divisible by a given number will help students choose convenient numbers in later computations with division.
  • calculators
  • blue and red crayons or colored pencils
  • blue and red markers
  • materials for display

LESSON 3

Multiplying by Multiples of Ten

 1–2 Students review multiplication of numbers that are multiples of ten and explore the role of place value and the turn-around rule (commutative property) in finding these products.
  • base-ten pieces (optional)

LESSON 4

Estimating with Multiplication

 2 Students develop strategies for computational estimation for multiplication. Students explore situations where estimates are appropriate and make estimates using convenient numbers.
  • rulers

LESSON 5

Hour Walk

 1–2 Students estimate the number of steps they would take if they walked for one hour. They devise, carry out, and communicate their problem-solving strategies. Students also review each other's work to provide feedback that informs a revision of their written explanations.
  • stopwatch or classroom clock with second hand
  • calculators
  • chart paper

LESSON 6

Using Multiplication Strategies

 2 Students review multiplication of one-digit by two-digit numbers and extend their understanding to problems involving multidigit numbers. They explore using mental math and other strategies. They review paper-and-pencil methods (using rectangles, expanded form, all-partials, and compact) and gain experience choosing strategies and methods appropriate for a given problem.

LESSON 7

Multiplication Strategies for Larger Numbers

 2 Students construct a menu of strategies and methods for solving multiplication problems involving larger numbers. This menu includes paper-and-pencil methods as well as mental math strategies. Students use this menu to practice these strategies and to develop connections between these strategies and methods.
  • chart paper

LESSON 8

Workshop: Multiplication with Larger Numbers

 2 Students practice solving multiplication problems involving multidigit numbers. This Workshop lesson allows students to choose from several problem sets and a game to review multiplication concepts and practice multiplication methods.
  • scissors
  • envelopes for Digit Cards 0–9
  • Digit Cards 0–9 from Unit 6

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