In Maths we will be learning to DOUBLE numbers.
When you double you add the same number together~ 1+1=2
Here is a song to help.

http://www.singup.org/songbank/song-bank/song-detail/view/148-mister-double-trouble/

http://www.ictgames.com/bridgedoubles.html

http://www.ictgames.com/robindoubles.html