Kids today have such heavy backpacks. This is caused by carrying too many heavy books. Kids have to carry these heavy books to be used for all their homework.
A study shows that children should only carry up to ten percent of their body weight. Children today carry almost twenty percent of their body weight. For some children, heavy books cause back problems.
In the 1980's children spent only an hour and a half to two hours on homework. Now, children spend almost three and a half-hours on homework.
The study also shows that kids need to have free time to themselves. …
