Just a few notes from class in regards to kicking. Crane before and after each kick for snap and to prevent someone catching the strike. If you let your leg dangle out near the opponent, eventually he will snatch it and apply a leg lock or counter strike. Keep the foot moving quickly and with balance. Ensure that your foot is properly positioned so the striking surface is furthest out. The pinky toe is not a kicking surface, the blade of the foot or the heel is.
Another way to help your kicks besides stretching is to strengthen the stomach muscles. The body core helps move the legs up and down. The stomach takes the brunt of that action, therefore a strong stomach will make stronger, faster kicks.
Please remember to practice your Kicking Sets 1, 2 and 3. They are simple moves but help so much.
Additionally, practice your Kicking Kempo 1, 2 and 3. KK1 is for a front kick. KK2 is for a roundhouse kick. KK3 is for a sidekick. They are not on the required list of techniques but they are invaluable in your training. Shaolin Kempo has more defenses against hand strikes than kicks.
Train hard and train often. Remember that perfect practice makes perfect.