Some exercises I do on a slide board are:
Slide Board Splits
-stand in the middle of the board with your feet together, and slowly slide them apart, and then slide them back together
-make sure not to slide your feet to far apart because trust me, it is a lot harder than it sounds
-you should feel this in your inner thigh
Slide Board Pikes
-Place your hands right off the end of the slide board with your feet on the slide board
-Slide your feet back, and then slide them towards your hands focusing on keeping your abs tight
-Make sure you keep your shoulders directly over your hands