Choose practicals that align closely with important topics. For Example, three ways of experimentally determining a rate law - all three ways should be used in the lab.
It’s very difficult to get students to ask questions because they feel they’re being picked on. But if they start putting up their hand and other students see that you’re prepared to be receptive to that then more and more will start putting up their hands. Invariably they’re good questions which still cover the topic. So you should have enough content for your lectures but not so much that you’ve got to force it to finish. The question that they ask, which they’re worried is a dumb question, is actually the question that probably nearly everyone else wants to ask but is afraid to ask.
Use small group student-centred interaction using structured work sheets that logically develop students' conceptual understanding. It’s a learning cycle approach.
Using clickers, put up say four ideas, and say, who thinks A and who thinks B, C, D. Now in the groups they need to defend their answer, and to talk about it. That way you get the feedback but you don’t have to say Bill, Mary, Jim, Jack, what do you think? You can get them to click their answers.
You can get the students to physically feel that liquids are not compressible by giving them three closed syringes: one contains water, say 50 mL, that’s been put in the freezer to become ice; another syringe contains 50 mL of liquid water, and the other one is gas. Ask them to push the syringes and see what happens. They find they cannot push the syringes containing liquid or solid, even though they think there would be some space in the liquid one. The misconception is that liquids fall somewhere between solid and gas and so should be “a bit” compressible.
