Getting a first grader to school is not easy. After all, it is at the beginning of school that a child needs the most auxiliary items, and books in elementary school are usually the largest. Therefore, science becomes hard for a first grader even in a literal sense.
This was attended by leading children's orthopedists of America. They remind parents that the school time of their children is not only different psychological loads, but also serious loads on physical health. Including they are required daily and closely monitor the contents of backpacks and backpacks, more precisely - for their weight.
After all, very often the weight of backpacks of first-graders becomes dangerous for the student's back. Professors from New York recommend: a backpack should weigh no more than 15% of the child's weight. That is, if a schoolboy weighs 30 kilograms, then his backpack should weigh no more than 4.5 kilograms. That is why now electronic textbooks are being actively introduced into the education of primary school students.