Lesson Plan

Explain that the digit in the tens place tells how many groups of ten and the digit in the ones place tells how many extra ones

Represent a two-digit number using bundles of ten and loose ones (e.g., 34 = 3 tens and 4 ones)

Understand that 10 ones can be grouped into 1 ten - a "bundle" or a "ten"

Decompose teen numbers (11-19) as one ten and some ones (e.g., 14 = 1 ten and 4 ones)

Identify decade numbers (10, 20, 30, ... 90) as groups of tens with zero ones

1.NBT.B.2

1.NBT.B.2: Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: a. 10 can be thought of as a bundle of ten ones - called a "ten." b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones. c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).