It's called Bedtime Math, but don't let that dissuade you. There is a new math problem posted every day and each scenario has three levels of difficulty for the problem! I have thought of a few ways that you could use it ~
* use the problems in your classroom every day for some quick and easy mental math work
* do the problem in your classroom, then post it to your classroom web page and have your students challenge their family to do it at home together
* share the link with your families in your back to school letter or and back to school night to let them know that it's important to do math at home every day, in addition to daily reading time
* have your students create daily math challenges for your classroom or for your 'buddy class' of you have one
from the web page ~"Bedtime Math isn't an official “curriculum.” It’s just a fun chance for kids to do math in their heads, so someday when they’re shopping and everything’s 20% off, they can figure out the sale price before the store closes."