I'm eager to learn to jump this summer. So when I saw this very helpful "Learning to jump a mountain bike" blog post and video by pro @philkmetz at http://philkmetz.com/videos/2016/4/11/how-to-jump-a-mountain-bike, I got excited. He recommends starting with either a homemade ramp or a bank. I found the perfect compromise of the two tonight at the Northfield Skateboard Coalition's skatepark. After 10 or so attempts, I started to get the hang of the pop/scoop/shove series of movements. Here's a video of my best one, though still a bit weak on the shove.
See Phil Kmetz’s blog post titled How To Jump A Mountain Bike