Play the instructional video. Pause at the times below to ask the following comprehension questions:
• At -3:00, ask: What are the 3 ways to write ratios? Can you write a ratio comparing 3 apples to a total of 15 pieces of fruit in those 3 different ways? (with a colon, as a fraction, or with the word to; 3:15, 3/15 , 3 to 15)
• At -2:40, ask: Why does the order matter in a ratio? Explain, using the last example in the video. (The order of the ratio matches the order of the items being compared. When comparing apples to total pieces of fruit, 3:15 is not the same as 15:3. 3:15 means 3 apples for every 15 total pieces of fruit. 15:3 would mean 15 apples for every 3 total pieces of fruit.)
• At -1:30, ask: How might you simplify the ratio for our fruit example? ( 3/15 ÷ 3/3 = 1/5 )