Correction

The aim of this proposal is to discuss two ideas of conserving energy in a school. The final paragraph will be dedicated to give a recommendation on which one is better.
Glass
By recycling this matter, we can could save a lot of money and time. Glass is special because people can use every bottle over and over again. In my opinion, having giving a recycle bin in the school would pay for itself.
Solar panels
Another suggestion to take into consideration is a solar panel. This device produces energy for free. Therefore, the first investment would not be a bad idea at all. There is a lot of sun above us which gives us energy. This energy could be used to empower enpower and  to strip lights in our school.
Heating
Finally, it's time to talk about radiators. Many schools ,including the ours one, uses old fashioned heaters. All what we can could do is to exchanging the old radiators for new ones. I suppose that this would save 30% of energy.
Conclusion
All in all, I think that all the mentioned ideas of saving energy are equally important. Recycling glass can be beneficial for us as well as buying some solar panels and radiators. If we make any of the above mentioned suggestions into to reality, then we will certainly save money that is necessary for other issues such us salary for teachers.