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This is a classic A level History question from one of the most examined(and most-difficult) parts of the French Revolution course. The important thing here is not to panic, and to break it down. Step 1 w...

The air that is breathed in passes down the trachea, the bronchi and bronchioles before reaching the alveoli. Oxygen is able to diffuse across the walls of the alveoli and the pulmonary capillaries into t...

First of all i would get the student to draw a diagram with the labelled sides and angles. Then i would test their knowledge of shapes and angles by asking them what the angles in a triangle add up to. On...