Mechanix page (article about basic knowladge for working on cars I.E. dont open the radiator cap when its hot)

Knowing what not to do (i.e. not touching rotateing parts and such)

saftey first (use your ppe)

standard vs metric (eplains about ratchets, and wrenches)

other shop equipment (tire balancer, car lifts, jacks, creepers, ect.)