The Inside-of- the- foot pass
Have the player face the target & "square up" so he, ball & the target are in a straight line.
Place the "plant" foot about 4" from the side of the ball, pointing toward the target. (The direction the plant foot points is important because that is the direction the hips will face; try it). The plant foot can be toward the middle or back of the ball, whichever the player prefers.
Head over ball, looking down; both knees slightly bent.
Teach the proper motion by first having the player place his striking foot flat against the back of the ball (about 5" above the ground) and pushing the ball toward the target and following through toward the target. (A push & follow-through; not a jab. Think of a tennis serve. However, jabbing a 1-touch pass is okay).
Be sure he contacts the ball with his toes pulled up (i.e., with the foot parallel to the ground) & the ankle locked. Make contact with the arch, below the anklebone & follow through toward the target so the ball has top spin.
Then, have him do the same, except start one step back from the ball, so the player, the ball & the target are in a straight line. This step provides power to the pass. If the pass goes into the air it means it was struck too low.