Referee Signals for Defense in American Football
American Football Referee Signals for Offense
4 NFL Rule Changes for 2013

A Collection of Images from Football Rules & Positions In A Day For Dummies

The playing field

Every marking on a football field serves a specific purpose.

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American Football Game-Play Referee Signals
Common Penalties in American Football
Football Players' Roles in Team Offense and Defense
How Football Teams Can Score Points in Game Play
American Football Passing Patterns
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