A small club in school to repair old computers

In many of our schools broken computers gather dust, while students never get a chance to learn computing. A school teacher and a local computer mechanic start a club one afternoon a week. Interested students open broken machines to see which parts are faulty and which can be reused. As machines come back to life step by step they are used in class. For safety, only adults handle anything connected to mains power. You need the school's permission, some basic tools, and a helpful mechanic.