I have always liked Atomic Learning, even if some of their instructive videos sound like they were recorded by Stephen Hawking. Good to see them with a mobile app finally! TBH

From the Website:
Atomic Learning offers training and professional learning to help students, educators and school leaders bring technology and curriculum together. With training at your fingertips, you can learn at your convenience – even when you’re not online.
Features:
• Access your Atomic Learning subscription
• Search for specific content
• Browse by topic
• Download Atomic Learning training to your iPad for viewing without an internet connection
• Automatically sync app activity to your Atomic Learning account
• Easily view your assignments and favorites
• Earn, view and share certificates of completion
• Quickly share your favorite series
