PebbleGo is working on the iPads this year! You still have to go through OneSearch to avoid having to login every time, but you can add the page to your home screen so the students can easily access it.
1. On the iPad, go to onesearch.henrico.k12.va.us — Elementary — PebbleGo
2. Click on the box with the arrow to the left of the address and choose add to Home Screen.