To celebrate March on Literacy, McGraw-Hill is offering its two Grammar Wonderland iPad apps – Grammar Wonderland (Primary) and Grammar Wonderland (Elementary) – for free for the entire month of March. Both apps are educational in nature, with the first aimed at kids in Grades 3-6, and the latter K-2.

Also, McGraw-Hill has pledged to donate $1.00 to the National Center for Families Learning for each Twitter user that follows it (McGraw-Hill) on Twitter @MHEducation.