The tablet is a tool, alongside pencil, ruler, scissors, etc. NOT the primary device for delivering content. The kids use them (K-2) to make movies, make sketches of the things they are engineering, and math drills.
It seems a good lesson was lost on the author: teaching the kids how to appropriately use this type of tool. At my daughter's school, we get it. Starting next year, Grades 3-5 will have an admin account on their take-home MacBook Airs. Yep, sounds totally crazy. The value here is teaching the children not just how to use their computer but how to take responsibility for keeping it running. Hopefully El Capitan rootless mode will provide a robust defense against those pesky Flash 0-day bugs.