Which kind of evidence would help to further support an argument that school start time should be later?

1. Scientific studies: Presenting research studies that demonstrate the impact of sleep deprivation on adolescent health and academic performance would support the argument for later school start times. These studies could include data on how insufficient sleep affects concentration, memory, mood, and overall well-being, as well as the relationship between sleep and learning.

2. Academic performance data: Showing data comparing the academic performance of students in schools with earlier start times and those with later start times would provide evidence for the benefits of later start times. Analyzing standardized test scores, grades, and attendance rates could help demonstrate that students perform better academically when they have sufficient sleep.

3. Health outcomes: Providing statistics related to the physical and mental health of students, particularly those with earlier start times, would further support the argument. This evidence could include data on sleep-related disorders, such as insomnia or sleep apnea, as well as mental health issues like depression, anxiety, and stress, which can be exacerbated by lack of sleep.

4. Traffic accident rates: Presenting data on the decrease in traffic accidents involving teenage drivers when schools implement later start times would emphasize the safety benefits. Studies have shown that sleep-deprived adolescents are more likely to be involved in car accidents, so demonstrating the correlation between later start times and reduced accident rates would strengthen the argument.

5. Behavioral and disciplinary data: Sharing information on student behavior and discipline records in schools with different start times can provide evidence for the positive effects of later start times on students' attitudes and behavior. If schools with later start times have fewer disciplinary incidents, lower rates of tardiness, or improved student behavior, this data would support the argument for changing start times.

6. Parent and teacher surveys: Conducting surveys among parents and teachers to gauge their opinions and experiences regarding school start times could add weight to the argument. If a significant majority of both groups support later start times and report improvements in their children's or students' well-being and academic performance, their testimonies can provide valuable evidence.