As we’ve said, the lesson has its story. This is what your plan is based on. We will do A; this will enable us to understand something (we’ll call it B). B will be defined in a transition and then carried forward into the next activity, C. It’s the carrying forward that counts. There is a thread, not a series of separate activities. If you have a clear and simple story, you have a coherent lesson. Obviously, then, pupils are most likely to make sense of the lesson if they understand the story, too