I like Mac’s suggestion of slowing the pace down from the start for them.
Below you’ll find a link to an awesomely comprehensive PDF guide for the agility ladder. I’ve found it to be incredibly helpful and would definitely recommend you check it out if you haven’t already. It goes through tons of drills and gives you lots of great information you can use to help beginners and elites alike.
Enjoy – and if you do – it would be great to hear your thoughts on it: