Is it possible to make nutrient solution at home with resources available?

Hello sir, i am a school teacher n have taken up hydroponic gardening as school project.our school is participating in GREEN-I contest and we had to come up with a project which will help in reducing carbon footprints, make school green and will be of help to the environment.

I thought of hydroponics. I'm stuck with the nutrient solution. I do not want to use chemicals or commercial fertilizers. Can you suggest something which can be done at home with resources easily available and something which can be done by my students.

It will be very kind of you if you tell me in what quantity the nutrients are to be mixed and any site where I will find details on hydroponics for beginners and specially on nutrients and nutrient solution.