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Year 8 Autumn 1 Lesson 10: RecipesObjectiveUse ratio tables to solve problems involving recipesAimStudents convert recipes for different amounts of people using ratio tables. This unit of work aims to show many different uses for ratio tables. The ratio tables differ slightly in this lesson as they have multiple rows, which shows that the same calculation should be used for each ingredient.The Come Dine With Me booklet at the end is preparation for the next lesson.Resources HYPERLINK "" Powerpoint Recipes worksheetRecipes exam style questionsActivity 1: Students will have some experience of using recipes from their Food Technology lessons and sometimes at home. It is worth embracing the context here. Do they think the salmon pasta and banana ice recipes look easy to make? Would any of the ingredients be difficult to get hold of? Do the students themselves have any experience of cooking meals for their friends?Introduce the students to the smoked salmon pasta recipe. The ratio table has multiple rows. Why is this? Students work individually on the worksheets after a short introduction for each part.Little progressStruggle to fill in the ratio tablesQuestions for progressionIf you know the amounts for 6 people, what is an easy number to work out?Can you work out any others?Some progressThey keep doubling and get to 24, but they need 22.Questions for progressionIf you have 24, how many do you need to take off?Do you have the amounts for two people in your table?If you know the numbers for 6, how can you find the numbers for 2?Substantial progressFind all of the amounts.Questions for progressionShow me another way?Is your way the quickest way?What happens if someone drops out, how can you alter the amounts quickly?After a couple of people have filled in the table correctly for the smoked salmon pasta, ask people for their amounts and write in the table on the whiteboard. Repeat activity for the banana ice creamActivity 2: Show the Gingerbread recipe for 20 gingerbread men.They should alter the recipe to make 32 gingerbread men.This time there isn’t a template for the ratio tables, so they have to draw their own.Little progressDon’t show full working out.Questions for progressionCan you draw a ratio table?What other values can you work out?Some progressThey work out amounts for 10 peopleQuestions for progressionCan you work it out in a quicker way?Could you fill the ratio table in one step?Substantial progressFinish for 17 people.Questions for progressionHow much would it cost to buy the ingredients?Can you buy 1.45g of something? What quantity would you buy?Can you write up your work, explaining your working throughout?As a consolidation exercise, there is a booklet of exam style recipe questions.Acknowledgements:NCETM Multiplicative reasoning resources ................
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