As with any scheduling model, trimesters don't solve every problem a school may face with their schedule. But it does provide an innovative way to look at the use of time.
There are lots of resources available on trimester schedules. One is a site devoted just to trimester schedules (www.trimesters.org). The other is a site from a high school that recently adopted the trimester model (www.a2skyline.org/skyline/home/trimesters). Finally, a Research Brief on the trimester schedule is available on the Education Partnerships, Inc. website and on my website (www.ronwilliamson.com).
I'd enjoy the opportunity to learn from you about your experience with trimester schedules and both the benefits and challenges you've encountered.