The Teachers' Tech Lounge Exploring the wise use of tech to increase student achievement 

 Mind Leap.Com is a site that helps you search for educational apps by subject or by grade level.  Then you are directed to the correct page to download.  From the web site…

Mind Leap makes sure that parents and educators know which apps are educational and which aren’t, which keep kids engaged and which bore them to tears. And, we encourage developers to build great stuff that turns kids on to learning.