Typically, anyone who skips a meal will tend to eat more calories in the form of snacks. Most teens in a school setting will then resort to sugary soda drinks, candy, and salty/fatty chips, etc. Thus, even though the teen has skipped a meal, the total number of calories for the day will likely end up higher due to snacking--and the QUALITY of the calories will be lower, resulting over time in poorer health (e.g. skin condition, alertness, fatigue, etc.). It's best to eat healthy, small meals at regular intervals than to skip.