Skateboarding, in one form or another, has been around since the late 1950’s when the first brave pioneer first attached roller skate wheels to a piece of wood. As skateboarding progressed to mimic surfing, skateboards evolved with the style of riding. Skateboards grew and changed shapes as riders experimented with everything from plastic to fiberglass to aluminum constructions - all in an effort to push what was possible. Like most sports or art forms, progression is at the heart of skateboard innovation.
To get higher ollies, I would suggesting resting your back foot on the very end of the tail and the front foot in the middle of the deck to allow for more slide. Popping as hard as you can and catching your board in the groove of the nose with you ankle practically resting in the groove will level the board out in the air. after this initial movement slide you feet back to the bolts on the tail and nose to ensure a clean landing.