### Calendars

Calendars were one of the earliest calculating devices developed by civilizations. Find out about the Mayan calendar in this article.

### Mathematical Symbols

A brief article written for pupils about mathematical symbols.

# Matching Numbers for Two

##### Stage: 1 Challenge Level:

Here's a game to play with a grown-up!

How do you play?
You'll need a grown-up to play with.
You can print out these cards or use this interactivity. Take it in turns to turn the cards over. Can you match the pictures? What do you need to look for?

Notes for grown-ups
This game helps children see numbers in many different ways. This can help them to develop the abstract idea of the numbers - this is known as "the two-ness of two".

Easier version: instead of turning over the cards, focus on sorting the printed cards into matching sets.
Harder version: children can use these blank cards to make their own sets of additional cards with different numbers on.

There's a group version of this game here.