There are 5 fundamental skill drills that should be taught in every soccer lesson, regardless of the age or skill level of the player, including:
First touch trapping balls on the ground (and in the air for more advanced players)
Short passing with both feet (5 to 10 yards)
Striking or kicking drills
Dribbling drills using different parts of the feet
1 and 2 touch passing drills
For more advanced players, body conditioning, footwork, and specialized training for goalkeepers are added to the lessons.