# Center

Five in a Row: Addition and Subtraction (1–2)

## Stage 1: Add 1 or 2

### Narrative

Students choose a number card 0-10 and choose to add 1 or 2 to the number on their card and then place their counter on the sum.

Each group of 2 needs 25 counters.

## Stage 2: Subtract 1 or 2

### Narrative

Students choose a number card 0-10 and choose to subtract 1 or 2 from the number on their card and then place their counter on the difference.

Variation:

Students can choose to add or subtract 1 or 2.

Each group of 2 needs 25 counters.

## Stage 3: Add 7, 8, or 9

### Narrative

Students choose a number card 0-10 and choose to add 7, 8, or 9 to the number on their card and then place their counter on the sum.

Each group of 2 needs 25 counters.

## Stage 4: Add or Subtract 10

### Narrative

Students choose a card that shows a multiple of 10. They choose whether to add or subtract 10 from the number on their card and then place their counter on the sum or difference.

Each group of 2 needs 25 counters.

## Stage 5: Add within 100 without Composing

### Narrative

Partner A chooses two numbers and places a paper clip on each number. They add the numbers and place a counter on the sum. Partner B moves one of the paper clips to a different number, adds the numbers, and places a counter on the sum. Students take turns moving one paper clip, finding the sum, and covering it with a counter.

Two gameboards are provided, one where students add a one-digit and a two-digit number and one where they add a two-digit and a two-digit number.

Each group of 2 needs 25 counters and 2 paperclips.

## Stage 6: Add within 100 with Composing

### Narrative

Partner A chooses two numbers and places a paper clip on each number. They add the numbers and place a counter on the sum. Partner B moves one of the paper clips to a different number, adds the numbers, and places a counter on the sum. Students take turns moving one paper clip, finding the sum, and covering it with a counter.

Each group of 2 needs 25 counters and 2 paper clips.

## Stage 7: Add within 1,000 without Composing

### Narrative

Partner A chooses two numbers and places a paper clip on each number. They add the numbers and place a counter on the sum. Partner B moves one of the paper clips to a different number, adds the numbers, and places a counter on the sum. Students take turns moving one paper clip, finding the sum, and covering it with a counter.