Today Room 15 learned a rap song about doubles.  It went like this:

It's the doubles, baby!
Let's go!  Let's go!
It's the doubles, baby,
And it starts with ZERO!

0 + 0 = 0 Oh!
1 + 1 = 2 Oooooooh!
2 + 2 = 4 More!
3 + 3 = 6 Kicks!
4 + 4 = 8 That's great!
5 + 5 = 10 Again!
6 + 6 = 12 That's swell!
7 + 7 = 14 Let's lean!
8 + 8 = 16 You're a queen!
9 + 9 = 18 Jelly Bean!
10 + 10 = 20 That's plenty!

"Please practice your doubles at home."~ From Mrs. Brick