Freestyle
Here are the basics for swimming freestyle.
Rotation is important; picture body rotating on an axis. Shoulders should go from pointing to the floor to the ceiling.
Eyes should stay looking at the bottom of the pool (head should not move/rotate.
Freestyle Kick Specifics
Keep straight legs; avoid bending knees (should not look how it does to pedal on a bike).
Move legs up and down, pushing water back.
Keep feet toward surface. I tell my swimmers to make white water.
Freestyle stroke (arms) specifics
Always keep a high elbow. When pulling underwater, keep elbow on surface of water and sweep hand down toward bottom of the pool, then push water toward feet.
Brind hand out of the water (keeping a high elbow) and bring it forward, almost dragging fingertips on the surface, then placing it in the water arm's length away from head.
Breathing
Turn head to side to breathe.
Think about keeping one eye in the water and one eye out of the water.
DO NOT PICK HEAD UP.