Instructions
Unlock the second level, the school level, after playing the hangar level. Start skating at the beginning of the level by using the directional pad on your controller to move in any direction.
Skate towards the right of the school level, and skate through the corridor area until you reach a large rail.
Grind down the large rail and make sure to stay on it. Listen for the school bell to ring a second time while going down the rail.
Continue riding the rail all the way to the end and then move quickly to the right from the rail to reach a ramp.
Use the ramp to enter the gym area of the school. Once in the gym you'll find an empty swimming pool, basketball court and many ramps.