Ratio - Calculating Ratio - Presentation

In a series of engaging activities, students are introduced to the concept of calculating ratios through practical examples. The lesson begins with a discussion about the different models and representations that can assist in understanding ratios. Students are then presented with real-world scenarios, such as a farmer planting crops. They are tasked with calculating the number of lettuces planted based on a given ratio to the number of corns, and then determining the total number of vegetables planted. This activity not only involves multiplication but also addition as students work through the problem. This approach to teaching ratio aims to solidify their understanding of the concept by applying it to tangible situations.

Further activities involve more complex scenarios, such as Tia preparing a vegetable salad, where students calculate the number of cobs of corn needed based on the ratio of carrots used. In another instance, Malachi has a packet of lollies with a known total and a ratio of red to blue lollies, requiring students to use a bar model to solve the problem. The lesson also includes reasoning exercises, such as comparing two boxes of chocolates to determine which contains more of a certain type, and calculating the cost of making a bracelet by considering the cost of the individual components and the ratio of beads used. These exercises encourage students to think critically and apply their knowledge of ratios to find solutions, reinforcing their understanding of the concept.