One of the difficulties with working with Technology in the classroom, is trying to stay current. There are always new apps, new websites, and new resources available. It always seems as soon as you learn how to use something, it quickly becomes outdated, and there is something "new". It can be difficult to "keep up" with new programs and ideas.
He is a former teacher and a leader in the field of incorporating technology use into the classroom.
His Blog: Free Technology for Teachers is a great resource for teachers of all grade levels.
There is a great deal of information on his blog, including apps for ipads, chromebooks, etc...
He updates the blog frequently, so I follow him on Twitter, as he posts on there whenever the blog is updated.
Hope this is a resource that can utilize to help you.