I heard a segment on NPR that spoke about a mother who gave her children mental (or not) math problems at bedtime each night. Here is the link to the NPR segment: http://www.npr.org/templates/archives/archive.php?thingId=157644780
The math problems help her children focus and settle down. When her friends showed interest in sharing the same practice with their children, she (Laura Overdeck) created a website. Here is the link to the Bedtime Math website: http://bedtimemathproblem.org/about-us/how-we-started/
This is aimed for young and older children and there are two or three levels presented each day. I might implement this each day with my class as a morning warm-up. Given the variations, Ms. Overdeck presents, I can differentiate for skill levels. Another possibility is to sell this idea to parents, but I suspect that children with enriching home environments would be involved, but children with little academic support at home would not. I want to reach all my students.