The document provides 12 tips for practicing environmental friendliness at school, including relying on natural lighting, planting trees, keeping the school compound clean, using handkerchiefs instead of tissues to reduce waste, using solar powered calculators, ensuring taps are turned off to avoid wasting water, using ordinary paper clips instead of colored ones, walking or cycling to school to reduce pollution, buying writing materials made from recycled paper, bringing your own food to school, using recycle bins, and reducing waste by using fountain pens and mechanical pencils.