Food companies that advertise their low fat products (eg low fat cheese, yogurt milk etc) are misleading the public since those foods actually contains large amounts of sugar/another alternate. Removing the fat from these foods causes them to taste horrible and to fix that, they have to add in a lot of harmful components.
Beverage companies selling diet soda as a healthy alternate to regular soda is also misleading. The artificial sweetners used instead of sugar in diet drinks are more harmful to the human body and a re devoid of nutritional content.
Try to incorporate all of these at the same time. I think that would be a good mix for all of your students. It also depends on what age your students are. If they are younger they may not be able to understand things that are too hard, so don't be too hard on them either.
Explanation: The way the word expenditure as used in this concept is a noun refering to the application of energy as a result of bodily movement. It also talkes about the use of energy