Posted on Twitter this morning...
Mental math - 30 seconds!
Are you getting your FREE answers and detailed solutions with strategies sent to your inbox? For details go to http://mathnotations.blogspot.com/2014/08/free-ccsssatchallenge-math.html
PLS SHARE THIS WITH COLLEAGUES!
Think there's a catch here because there's no such thing as free? Why not ask the teachers who have been receiving these?