# Counting by 1

#### Counting Down

How to use:

• Count while watching. What do you notice? What do you wonder?
• Eventually, students will notice that the pattern in the ones place is 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3… and the pattern in the tens place is similar: 1 ten, 1 ten, 1 ten….2 tens, 2 tens, 2 tens… etc.  They will be able to describe why a number is written the way it is and what it represents: 27 is 2 groups of ten (seen as the blue bars) and 7 ones (seen as red dots). 2 tens is 20, and 7 ones is 7, so 20+7=27. They will make a connection to addition/subtraction: counting up is like adding 1 each time, counting down is like subtracting 1 each time.

#### Counting Down with Hidden Numbers

How to use:

• Count while watching. What do you notice? What do you wonder? Pause and ask: What number comes next and how do you know?
• Eventually, students will notice that they can predict the next number by using the pattern: in the ones place it is 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3… and the pattern in the tens place is similar: 1 ten, 1 ten, 1 ten….2 tens, 2 tens, 2 tens… etc.  They will be able to describe why a number is written the way it is and what it represents: 27 is 2 groups of ten (seen as the blue bars) and 7 ones (seen as red dots). 2 tens is 20, and 7 ones is 7, so 20+7=27.

#### Counting Up (Companion Visual to Playing Cards)

This visual is intended to be used with the 2 digit playing cards (see below).

How to use: