The Ten Worst Teaching Mistakes

1.Disrespect students.
2.Teach without clear learning objectives.
3.Get stuck in a rut.
4.Give tests that are too long.
5. Fail to establish relevance.
6.Have students work in groups with no individual accountability.
7. Fail to provide variety in instruction.
8.Turn classes into PowerPoint shows.
9. Call on students cold.
10.When you ask a question in class, immediately call for volunteers.

http://tomprofblog.mit.edu/2009/09/02/370/