You probably can't cover everything you want to in a lecture.
Decide what is essential, what is important, and what is helpful (what would be nice).
- Cover the first; try to cover the second; forget about the third.
- Release a little control over the material and rely on the textbook or a list of supplementary readings for the nonessentials.
Set objectives.
- What do you want to have accomplished at the end of the lecture?
- What do you want the students to know and be able to do at the end of the lecture?
Plan a lecture to cover less than the entire period.
- It takes some time to get going.
- Questions always take up more time than you expect.
Divide the lecture into discrete segments and follow the standard speech structure.
- Divide it both in terms of time and in terms of material.
- Try for ten or fifteen minute blocks, each one of a topic.
- Briefly summarize the previous lecture; introduce the topic(s) for the day; present the material; summarize briefly; preview any homework and the next lecture.
Lecture from notes or an outline, rather than a complete text.
- It's too tempting to simply read, rather than lecture, from a complete text.
- Reading also creates a barrier between teaching and students.
- Writing up an entire lecture is very time consuming.
- A written lecture often becomes a fossil that never gets updated
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