The teacher begins every lesson by posting a challenge problem or question on the overhead. (educationworld.com)
Note: Before beginning the lesson with students, the instructor should have constructed his / her own turbine to use as a model in guiding students to develop their own designs. (teacherstryscience.org)
If appropriate or desired for your students, you might show them an example of a completed travel journal before beginning the lesson. (educationworld.com)