Hi Elise,
Yes, channelling drills are a great way to work on the jab tackle. They allow players to adopt a side on position to jockey the attacking player and pick the right moment to intercept and poke the ball out of harms way.
I've also found this video really useful, it includes clear coaching points on the jab tackle technique as well as a handy drill to try out.
Hope this helps,
Archie

