Some argue that older students can sit longer, so they can do an additional amount of homework, but it is also proven that these students may fail a test if they study too long. The rationale behind this came from the 10th to 12th graders. Results appear to improve when students do homework, although after doing it for an hour and a half or more a night, results decline. Academic success tends to increase with less homework. A person's brain needs downtime to process information