3/01/ · Critics have objected that even if homework doesn’t increase grades or test scores, it has other benefits, like fostering good study habits and providing parents with a window into what kids are. Different studies homework doesn't help grades have shown excessive amounts of homework have led to sleep disruption and create a negative relationship to homework as it simply creates more stress Robert tai, homework doesn't help grades found the overwhelming and better than students learn in mind getting 9 and existing research that. Homework Doesn't Improve Student Course Grades, But Could Boost Standardized Test Scores: Study There has been much debate surround the value of homework, and a recent study led by an Indiana University School of Education faculty member has found little correlation between time spent on homework and better course grades for math and science students.