You are better off making assignments worth less points and making in class tests / quizzes worth more i have answered a similar topic to this you have to emphasize that it is a tool and using it incorrectly will not teach you anything. by changing how scores are distributed you increase the incentive without needing to do much more work someone may be better than explaining it but you could likely show examples of how you can reasonably use it to learn what to do instead of solve this for me