Very nice blog from Pulaski Community School District in Wisconsin. Blog maintained by Mr. Reisler, 8th grade teacher, that has students contribute app reviews.
One more. Thanks for sharing I've put links to other learning platform tools & resources here - http://www.pinterest.com/fabriziobartoli/lms/ - if they can be of any interest... - Though I think probably Schoology remains at present the best choice for teachers among free learning platforms. Cheers!