Remember as a kid when you put out your hand, palm down, and your friend put his/her hand on top, then you slapped your hand on top and continued building and slapping? Think of that slapper game when you think of the "because slapper". You are building on to your statement, using the word because.
For example, "I know that 8+7 is 15 BECAUSE it is doubles plus one, and BECAUSE I know 7+7 is 14, I can easily figure out 8+7".
Or, "Shoe is a noun BECAUSE a noun is a person, place or thing, and shoe is a thing, therefore it is a noun."
My first graders are getting really good at explaining their answers using "BECAUSE" and they are growing in their critical thinking skills in the process!
Deb Weigel
WBT Arizona