2 Digit Window Frame

This idea started life as a way to get children to generate 'random' 2 Digit numbers. We had used dice, we had used Digit Cards, but I wanted something different.

This is what I came up with, a 10 by 10 grid of numbers and small card with a rectangular hole in it.

The rectangular hole (the Window Frame) is sized to match two adjacent squares on the 10 by 10 grid. The children drop the Window Frame down anywhere on the grid to instantly show a 2 Digit number.

Alternatively, you can assess the children's understanding by asking them to look carefully at the 10 x 10 grid, locate a specific number and then "Frame it".

As an assessment tool
Children respond to prompts by placing the Window Frame on the 10 x 10 grid...

• “Can you find me.... ?“
• “Can you find a two-digit multiple of 2?”
• “Can you find a two-digit multiple of 5?”
• “What is the largest two-digit number you can find?”
• “What is the smallest two-digit number you can find?”
• “Show me a two-digit number, and partition it”
• “Show me a number that is more than 30 but less than 60...”

Calculation
You can also use the Frame and 10 x 10 board to help children develop mathematical skills with rounding, bonds to 100, factors and addition and subtraction calculation.

There are two pdf files* below; the 10 x 10 grid and Window Frames (A4), and a separate file with teacher notes and further ideas.

Note: This resource has now been extended to include numbers with 2, 3, 4 and 5 digits! See the 5-digit Window Frames resource for more details.

* If you cannot see the Attached file below, remember that you need to Login/Register first.

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