Training classes

Does anyone have tips or advice on training group classes? I just took a job with petco, and our local store is expanding/changing their training program, which in really excited about.

I've never taught a group before. Classes will be 3-6 dogs/handlers/families. I'll be observing a few classes by other trainers first and observed/evaluated on my first sessions so I feel pretty good about it, but I'm looking for any tips or pros/cons, just advice or info for trainers who have done classes instead of just private lessons.

Classes will be puppy classes, clicker basics, basic adult dog obedience, rally O, and possibly a tricks class.

My biggest tip - know how to teach each item at least three different ways, and know how to explain each three different ways.

You should have several things that you would like the class to accomplish by the end, but also know that each person will progress at a different level. I've been to several (Agility) classes that are so cookie cutter it just drives me insane.

Like the poster above said, you should know how to explain everything a multitude of ways!