Here are some good videos from the NRA on Firearm Science
These videos have good information for both beginners and advanced shooters.
FIREARM SCIENCE: AIM | FIREARM SCIENCE: PROPER GRIP |
FIREARM SCIENCE: PROPER STANCE | FIREARM SCIENCE: RECOIL EFFECTS |
FIREARM SCIENCE: TRIGGER CONTROL | FIREARM SCIENCE: MOVING TARGETS |
FIREARM SCIENCE: BULLET SPEED | FIREARM SCIENCE: PRESENTING FROM CONCEALMENT |
FIREARM SCIENCE: POINT OF IMPACT VS. POINT OF AIM | FIREARM SCIENCE: REVOLVER MECHANICS |