Like ChrisW said, teaching students prompts an interesting introspective experience. Thinking about "how do I actually form the embouchure", "how can I describe proper breath support", and "what do I remember from when this was explained to me" will help you get started. If you can find a local mentor to give you a few lessons on teaching beginner students, you can likely pick up many useful techniques, terms, tools and resources. If you have a current or former teacher who was particularly helpful in explaining concepts to you, that person may be a fantastic resource. Observing other teachers with students is helpful, too. Don't limit yourself to observing only bassoon lessons - some of the best descriptions & concepts I picked up about teaching breathing came from observing an excellent vocal teacher.
You might also take a poll of teachers as to what method books they've found are helpful. Kent mentioned two of the major bassoon methods in his post, and I've also heard that Chris Weait's book is an invaluable resource. (I'm an oboist, so I don't have any specific recommendations for you. Perhaps someone has posted a summary of bassoon method books online or in the IDRS. For example, on my website, I've posted a summary of the major oboe methods and the ones I choose to use - I wouldn't be surprised if a bassoon teacher has created something similar). It is a very good idea to visit a music store and/or a library and take a look at the major method books, and decide what the best resource would be for starting someone who has never played bassoon. Note that this may or may not be the same resource(s) you'd use for someone who has played bassoon for a while without any private instruction, or someone who has studied privately with another teacher.
When I first started teaching students, I really followed what my previous teachers did. This works to a certain point, however, you will soon find students with different issues and problems than you did. You'll find one student that quickly understands the way you describe and demonstrate embouchure, and another who will take weeks of explanations, demonstrations, and experimentation to learn the same concepts. Keep in mind that there are many different learning styles: some students respond well to broad concepts they can visualize, some are very good at reproducing a sound or style they hear you demonstrate, others may require detailed physical descriptions of what to do. Over time, you'll develop several ways to describe and demonstrate every major technique.
As a teacher, you'll always be learning, often will be challenged, and occasionally be surprised and perplexed by a new issue. These are some of the reasons that makes sharing your art, craft, and knowledge with others such a fantastic experience for you as well as those you teach. Both you and your students will continue to grow throughout the process. Be creative, experiment, and have fun!
Lynne Marie Flegg