a way to add more than one trial at a time -

It would be useful in my business to allow the end user (admin) to enter more than one class at a time for a trial class. Currently we offer a 7-day free class pass. They can come and try as many classes as they want to for a week - right now i have to click on each and every class individually to add in the trials. This is cumbersome and long. An easier way would be fantastic.