Data on homework struggles is often collected indirectly through measures like:
* Grade performance: Low grades can indicate struggles, but this doesn't pinpoint homework specifically as the cause. Other factors like learning disabilities, attendance issues, or home environment play significant roles.
* Teacher surveys: Teachers might report on students who frequently need extra help or consistently fail to complete assignments, but this is again subjective and may vary significantly by teacher interpretation.
* Parent reports: Parents might report their child's struggles, but their perception can be influenced by their expectations and understanding of the child's abilities.
* Student self-reports: Students might express feelings of frustration or inadequacy with homework, but this can be unreliable due to factors like self-esteem or reluctance to admit difficulties.
While studies touch upon related issues like achievement gaps and learning difficulties, they don't usually isolate "homework struggle" as a single, quantifiable metric. Therefore, it's impossible to give a numerical answer to your question.