For those of you who may have missed an EDge21 featured post or who didn't have the opportunity to look at some of them during this past week, here's a second chance.
SlideShark is a free app that enables you to show PowerPoint presentations from the iPad, iPhone, and iPod Touch the way they were intended to be seen, with animations, fonts, graphics, hyperlinks, and videos intact.
GrammarBase is a free grammar checker and corrector, a free online spell checker, and can even help with dyslexia mistakes.
Gerald Aungst, Supervisor of Gifted and Elementary Mathematics at School District of Cheltenham Township in Pennsylvania, is developing a Common Core Toolkit for Principals.
KnowRe is an online adaptive math learning program with the goal of helping students succeed in math.