My Northern Praying Mantis instructor said we should practice a form 1000 times before expecting to learn a new one. He emphasized quality rather than quantity of forms.
I choose to teach less than five mantis forms.
Theories/strategies from each form are extracted and taught.
Students drill every combination from every form as they study the form. Drills are done on the wooden dummy, BOB, focus mitts and a training partner. Combinations are expected to be worked into the sparring session in each class.
After one form is thoroughly trained in the above methods, a new form is introduced and trained the same way.
Students are expected to remember every form (and its quan pu) and be able to perform it whenever asked, regardless of how long ago the form was taught in class.