To redeem lessons go to the "book" tab on the menu and select  "lesson calendar". 
When completing the sign up process you will notice that the payment will be used from the pack you have. 

PLANS WILL NOT SHOW IF YOU ARE LOOKING AT A PLAN FOR PRIVATE 60MIN CHILD LESSON. YOU WILL NEED TO BUY THE PL PASS CHILD WHICH CONTAINS 8 x 30 MINUTE LESSONS & 2 CAN BE USED TO SCHEDULE AN HOUR LESSON.