Unit 3 Counting and Place Value

In Unit 3 students will:

  •  Count to 120, starting at any number less than 120.  In this range, read and write numerals and represent a number of objects with a written numeral.
  •  Understand that the two digits of a two-digit number represent amounts of tens and ones.  Understand the following as special cases:
    • 10 can be thought of as a bundle of ten ones—called a "ten."
    • The numbers 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
    • 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).

By the end of Unit 3 your child should be able to answer the following questions:

  • How can I use a number grid or number line to order numbers?
  • How can I use place value strategies I've been taught to create numbers that are ten more/less or one more/less?
  • How can coins help me to count and understand place value?
  • How do place value strategies help me to become more fluent with number facts?
  • What patterns do I use when I count and connect a written numeral to a set of objects?
  •  How does understanding greater than, less than and equal signs help me to compare the value of numbers?

The following videos explain some of the topics covered in Unit 3.

  • Adding 10 More and 10 Less


  • To Practice Making Numbers With Place Value Blocks 
  • For More Place Value Games


  • Counting Coins Song

  • To Practice Ordering Numbers 1-100 
  • Greater Than/ Less Than Song