Today the weight of the bag which our children carry to schools is 100 times more than what is taught to them in a day.
The answer lies in the fact that there may be just one teacher for smaller classes. Why, because only one teacher can teach all the subjects.
Hence, why to have six to seven books for small children. Most of the times the children carry complete books where as they are being taught only one chapter at a time. Hence we can have books tailor made for each class which has all the subjects in single book. This book can have 5 to six volumes to cover part of the chapters from each subject as the class progresses in the academic year.
Similarly there can be just 2 to three notebooks for all subjects.
This way it would be possible to save paper as well as money for the parents.
Of course this would be strongly opposed by the schools, publishers as well as people in the business as this will reduce their profits. We have to take a decision whether to reduce load on our children or not.
The government could introduce these integrated books and notebooks in government schools and then issue guidelines to private schools.
Imagine how happy we were to carry just one notebook to the college.
Note: The analysis of the fact that the children are carrying full bag in a day while they can use only 2 to 4% in that day can be used in other problems to find a better solution which is economically more viable, it is similar to a situation where we have to carry yearly requirements daily whereas we can make do with 5 to 10 days of requirement without the need for stocking yearly requirements.