A great lesson that teaches prices elasticity of demand (PED). The lesson includes all the key theory behind the concept of elasticity, the difference between elastic and inelastic goods and how to calculate price elasticity of demand. The lesson also looks at elastic and inelastic demand curves. There are many tasks throughout the lesson including a product list task, guess the demand curve task and many tasks on calculating the price elasticity of demand - starting with a simple table tick task, leading up to deep calculations using the PED formula. A perfect lesson for introducing a tough topic.