Proportions
 Provide proportional tasks in a wide range of settings, because how students approach these tasks is influenced by the contexts of the tasks. Some familiar contexts might include speeds (miles per hour or feet per second), prices (pounds per dollar or ounces per cents), and in scales (miles per inch or feet per inch).
 An out of class activity which is often very informative is to have students go to the store with their parents and list the prices for 10 or more products. Then have them solve the proportion for the unit price of each product.
 Have students bring in the costs of some products from newspapers and have them find the prices for varying amounts. For example, if an ad offers 3 packages for $1.25, have the students find out how much would it cost for 8 packages or for just one.
 Many problems from science involve the use of direct or indirect proportions. For example, the volume of an object decreases as the pressure on that object increases.
 
