UNIT PREPARATION

Display the class number line (0–130) where students can see and reach it with a pointer.

Attach a desk number line (0–100) to each student's desk to use throughout the year.

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

Gather and organize sets of base-ten pieces.

Gather the I Have, Who Has Game Cards from Unit 5

Have the following tools readily available for the Daily Practice and Problems items in this unit.

  • You will also need eight items to place in a pretend store.

LESSON SESSIONS DESCRIPTION SUPPLIES

LESSON 1

Time to the Nearest Five Minutes

 1–2 This lesson introduces students to telling time to the nearest five minutes. Students explore the proportional relationship of the minute hand to the hour hand through observation, trial, and questioning.
  • demonstration clock
  • individual student clocks
  • I Have, Who Has Game Cards from Unit 5

LESSON 2

Introduce Base-Ten Pieces

 3–4 Students are introduced to the base-ten pieces as a way to represent two-digit numbers. They estimate and then count a collection of "bits" (ones). They compare "bits" and "skinnies" (tens) and discover the 10 to 1 relationship. Students play a game and represent numbers in different ways.
  • base-ten pieces
  • self-adhesive notes
  • centimeter rulers
  • chart paper
  • clear plastic spinner or pencil with paper clip
  • connecting cubes
  • resealable bags
  • referent bags of connecting cubes from Unit 5
  • referent bags of 10 and 100 base-ten bits

LESSON 3

Look at Flats

 1–2 Students measure and count bits and skinnies to find out how many bits are in a flat and how many skinnies are in a flat. They represent numbers in the hundreds using flats, skinnies, and bits.
  • base-ten pieces

LESSON 4

Many Ways to Make a Number

 2 Students work in pairs to model numbers using their base-ten pieces. They make trades and determine which representation shows the Fewest Pieces Rule. They make the connection between the Fewest Pieces representation and place value.
  • base-ten pieces

LESSON 5

Comparing and Ordering

 2 Students compare and order numbers with base-ten pieces and on a number line. They describe numbers using less than, greater than, and equal to. They write number sentences with the <, >, and = symbols.
  • base-ten pieces
  • number lines
  • envelopes or resealable bags

LESSON 6

Base-Ten Hoppers Again

 1 Students develop flexibility composing and decomposing numbers. They use moves of ones, tens, and hundreds on number lines to develop mental math skills.
  • base-ten pieces

LESSON 7

Workshop: Place Value Concepts

 2–3 Students practice representing numbers as hundreds, tens, and ones and comparing and ordering numbers using those representations. This Workshop lesson provides opportunities for students to revisit concepts, apply concepts, or extend their learning.
  • scissors
  • base-ten pieces
  • envelopes
  • spinners or pencils with paper clips
  • chart paper

x