To keep your summer classes packed, plan an attendance contest that awards prizes for each month and a grand prize winner for the entire summer.
Get started by setting a standard number of classes that each student must attend, each week consistently for a month to be eligible for an attendance award. You can create an award certificate on your computer that you can print yourself to keep expenses down.
Next, run a contest to see who can attend the most classes each month and award several levels of prizes (like 1st, 2nd, and 3rd place). So that you don’t break the bank, ask local businesses to donate prizes or certificates that your student might like such as: free pizza, haircuts, nail services, video/game rentals, massages, movie passes, etc. In return to the businesses that donate, offer them free training certificates at your school, you may get a few new students out of it.