Bunnyhop - A bunnyhop is one of the more fundamental tricks that is used for a lot of harder tricks. It is basically like a wheelie and an endo at the same time. It is a hard trick to teach. Basically, you pull the front of the bike up like a wheelie, and then while the front is going up you lean forward on the handlebars and pull up the back. It takes a lot of practice, but once you can do one well, you can do a lot of things.
Wheelie - pull up on the bars and pedal. Find the balance point over the rear axle and you can ride wheelies forever.
Manual - In a wheelie you pedal, but in a manual you don't. To do a manual, pull back on the bars, AND lean way back. Hold on with your fingertips. By "flexing" your knees in and out, you can ride a manual a while. It's easy to do.
Peg leads - While you are doing a manual push forward. This will level your bike out and you will be in the air.
Feeble grind - Bunny hop the back peg onto a curb, bench or a railing. Bring the front wheel down on the top of the curb and grind down it. When you are done, bunny hop off the curb and ride away.