The statement that failed to support the claim in a meaningful way is:
"My teenagers have reported a tendency to skip breakfast which some nutritionists consider the most important meal of the day altogether."
This statement does not directly address the main argument regarding the timing of high school classes. While it highlights a related issue about teenagers skipping breakfast, it does not provide evidence or reasoning that ties in with the claim that high school classes should start later. The other reasons listed directly relate to sleep needs, attention spans, and the busy schedules of teenagers, which all support the argument for later start times.