These change of direction soccer drills from Coerver Soccer found on YouTube would serve as good warm up drills to loosen up the ankles and get some focus at the beginning of your practice just after stretching. When you are letting your players know what is expected you should do a short walking demonstration and I would suggest doing the the first drill, the outside foot change of direction, for a few minutes until most of your player have it and then do the second drill and third drill separately before maybe trying a combination of two of the drills and then all three and finally calling out just before the cut which of the three changes each player is to use. You can do any game or variation using these three change of direction drills but, how ever you do it, make sure to regularly practice these types of drills. As the beginning of the video suggests, these are drill designed to provide your players with a foundation. In other words these types of drills are essential to building the fancier moves.