Zone blocking requires that players understand they are blocking zones not players. Zone blocking also requires that offensive lineman understand when to release from a double team and block the guy in their zone. To be effective in a zone blocking scheme players must rep all of the various 2v2 and 3v3 combinations daily.
The clip below was recorded at a Miami Dolphin OTA session. These drills would be great to incorporate into your practices if you utilize a zone blocking scheme. The video itself would make a great teaching tool for your players.
This video is from the USA Football YouTube Channel. You can find many other great teaching videos by click on the link to their channel.
The YouTube video has sound, so please make sure that your sound is turned on and that you have access to the site. (some schools block access to YouTube)
The first drill illustrates blocking assignments in a two verses two situation. You have an offensive tackle and tight end vs a defensive end and linebacker. Blocking assignments are illustrated for when the backer is lined up outside and inside. In each case it is critical that the blockers keep their eyes up so that they can find the linebacker when and if the release to pick him up.
The second drill is a 3 v 3 drill with a center and two guards lined up vs a nose guard, defensive tackle and middle linebacker. If the play is two the left, then the left guard and center step left and take on the nose tackle. If the center gets him under control, then the left guard can get to the second level and pick up the linebacker if he is outside. The right guard also steps left and gets up field to block the second level.
The final drill features and offensive guard and tackle verses a defensive lineman and linebacker. You will want to work all possible 2v2 and 3v3 combinations so that your players can act instinctively during the game