Mobile Education Store has released a new app called Tensebuilder which sounds like a motivating activity for working on verb tenses. I have been using their Rainbow Sentences App and Conversation Builder and find that they are motivating to kids.
Here is a link to a giveaway that ends today:
http://www.smartappsforkids.com/2012/08/brand-new-release-tensebuilder-15.html#
