To support the argument that "The school district should revise its homework policies," one could present the following claim:
"Current homework policies contribute to increased stress and mental health issues among students, leading to a negative impact on their overall academic performance and well-being."
This claim can be further substantiated with evidence such as studies linking excessive homework to stress levels, testimonials from students and parents, and data that show a correlation between homework load and declines in student morale or engagement.