I found this one the other day and was impressed with the quality of the links. Kathy Casey has obviously spent a good deal of time collecting great resources for using the iPads in the classroom. This is the sort of curation and sharing that Pearltrees was designed for and Kathy has certainly used it well.
Make sure you also have a look back up the tree as she also has some great resources around;
- 21st Century Learners,
- Technology to Promote Thinking and