This document discusses energy expenditure at IES Alpujarra high school. It analyzes electricity, paper, and fuel usage and identifies areas where energy is being wasted, such as poor window insulation and broken computers. Alternatives are proposed like installing new windows and radiators to reduce heat loss, and replacing old computers. The document proposes a project to install 470 solar panels on the school roof to harness the sun and reduce energy spending by an average of 75%.