MA 5.02Stamp Game: Writing First, Stamps to Check

1. 1

   Give the child a problem the child has already solved with stamps. Ask: 'Can you solve this on paper first?'

2. 2

   The child writes the problem in columns on squared paper, starting from the units.

3. 3

   When a column reaches ten or more, show how to write the carried ten above the next column.

4. 4

   The child writes the answer.

5. 5

   The child solves the same problem with the stamps and compares.

6. 6

   Repeat with subtraction, showing how to record an exchange by crossing out and rewriting.

7. 7

   Over time the child checks with the stamps only when unsure.

What catches the child’s eye

• Checking the paper answer against the stamps to see if they match
• The small carried numeral written above a column

Extensions, easiest to hardest

1. Multiplication by one digit on paper, checked with stamps.
2. Problems with zeros in the larger number.
3. The child writes problems for a friend and checks the friend's work with the stamps.