Education system: Value chain analysis

For my topic , opportunity cost comes into play.
Instead of spending my time in a  classroom how can I utilise the time in a more productive way ?
* In a moral value education class, they talk about loving and caring and human behaviour, instead of just talking about it , why not going to some slum area or some orphanage, and understanding the people and  helping them as much as we can do.
* In higher classes like 11th and 12th, there are limited options, science , commerce or arts which restricts a child to show his or her creativity and they end up doing something they don't want to do.
In India it has always been like this:
-Above 85% in 10th std:Science
-Below 85% : commerce / arts
•In my case I had decided in 10th itself I want to pursue design , but I didn't have any option for that and I had scored good marks in my 10th std , so I ended up taking science .
I was sitting and solving some random problems which didn't even make sense  to me and was by hearting chemical reactions which I was not at all interested in. Understanding the basics of every subject is important but solving long equations  manually which can also be done using calculators, does not make sense .So here comes the opportunity cost, I could have done something much better, could have improved my sketching skills, or maybe my thinking process or visualisation power. To pursue my interest i had to go to private classes, so much time was being wasted in school.
So like me there maybe many students who are facing the same problem.