The traditional development cycle for training courses, technical or otherwise, is a little different from the software development you may be used to. Think of all the artifacts in a typical training course. You probably get manuals to take home. There might be a few videos to watch. Instructors must be trained on the material. Labs and exercises must be designed and tested and tested again. Marketing assets must be generated and distributed. Facilities must be booked, along with any network requirements. If it sounds exhausting, that's because it is. That's why most training courses have a measured development cycle. A course is developed, proofread, tested, debugged, and then released. Put a fork in it, because it's done. Time to start again on the next course--scheduled for release in 6-8 months if you're lucky.
My Puppet Labs training is a little different. We move at a different cadence and might release three times in a week, if needed. Read on to find out why and how we manage this without losing our sanity.