This week – Learn double facts to 20

Many young learners use their fingers or counters when they first learn to add. Help your students learn strategies that help them add and subtract faster. Memorizing doubles facts will help them manipulate numbers and empower them to use multiple strategies to approach math problems.

http://www.brainpopjr.com/math/additionandsubtraction/doubles/grownups.weml

http://www.eduplace.com/math/mathsteps/1/a/