To support the argument that "the school district should revise its homework policies," you could use the following claim:
Claim: Research indicates that excessive homework can lead to increased stress levels and diminished student well-being.
This claim can be backed by evidence from studies showing that too much homework can lead to negative mental health outcomes, such as anxiety and fatigue, which could adversely affect students' overall academic performance and personal development. By highlighting the importance of student well-being, this claim underscores the need for the school district to reevaluate and potentially revise its homework policies.