Kids get confused about where to stand on corner kicks.
It can be very hard to teach at practice as you won’t have a realistic number of players on the scrimage field unless you’re practicing with another team.
Still, I strongly believe you are better off teaching this without a diagram!
Why am I showing the diagrams then? Well I made them in conjunction with the range charts and thought they might help to have individual one-on one conversations with players to remind them when they weren’t on the field with the rest of their team.
Again, use them for what they are worth to you as conversational tools, or not at all.
Be sure to focus your efforts not with charts but with demonstrations in practice.