[chanind]

I really like the idea of using the lock screen as more than just a simple way to get into the phone. I would love to use something like this to force me to spend a few seconds learning something every time I want to get into my phone.

[nthitz]

I recently installed DashClock https://play.google.com/store/apps/details?id=net.nurik.roma... and while it's not strictly a 'learning' tool you could likely write an extension for it to do what you are looking for. I like it so far, better than normal lock screen anyway.