Lectures place the burden of organizing and synthesizing content solely on the lecturer. They are not well suited to higher levels of learning such as application, analysis, and synthesis. Lectures are not well suited to complex, detailed, or abstract material. Lectures assume that all students are learning at the same pace and at the same level of understanding, which is hardly ever true. Lectures do not sustain student attention, which wanes very quickly in one to 25 minutes.
Lectures tend to be forgotten quickly.
How to Plan an Effective Lecture Instructors might remember that the learners' minds are not blank slates, and the organization of the lecture must take into account the students' existing knowledge and expectations as well as the structure of the subject matter. Select a topic. The lecturer's first decision should be on the overall subject matter of the lecture. This will probably be drawn from whatever is on the syllabus for that day's class. Decide on the purpose.