It's planning backwards, but not really starting with the assessment--start with what you want them to know--the "enduring understandings." I usually think of it as, "What should my students remember about X 10 years from now?" Then, you decide what assessment type will prove that the student grasps the enduring understandings. Then, you develop a list of what information they need to be given and skills they will need to practice.
The UbD lesson plans are quite detailed, but at least they are for an entire unit. I have done UbD lesson plans for a couple of the units I do, but not all of them yet. I teach social studies, so they wouldn't really be helpful to you. Try this site, though:
Big Ideas - Exploring the Essential Questions of Education