We have all seen it! The flashy science experiment that really is very exciting and certainly gets students to observe, but somehow falls short when it comes to actually teaching a concept.
I tell my beginning teachers, make sure you think about what concepts, skills or ideas you want to teach first and then come up with a great experiment to go with it.
Take the Lava Lamp. It is spectacular and easy to do. The students love this one! It is colorful! It happens fast! It uses simple household materials! But what are we actually teaching?