A journey through the world of ratios A lesson created by Lari Valtierra and Rodney Ragland.

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Presentation transcript:

A journey through the world of ratios A lesson created by Lari Valtierra and Rodney Ragland

What fraction of the shapes above are red?

What fraction of the shapes above are triangles?

What fraction of the shapes above are red squares?

What fraction of the shapes above are green or circles?

Today we will taste test orange juice. We will make many recipes and decide if the taste has changed.

If the orange taste is stronger in the new recipe than the original, then you will say that the new recipe is “less watery.”

If the orange taste is not as strong in the new recipe than the original, then you will say that the new recipe is “more watery.”

Group 1: 1 part concentrate 3 parts water Group 2: 2 parts concentrate 5 parts water Group 3: 2 parts concentrate 8 parts water Group 4: 3 parts concentrate 2 parts water Group 5: 3 part concentrate 3 parts water Group 6: 1/2 part concentrate 2 part water

What is a ratio? What are the three ways to write the ratio of boys to girls in this classroom? What did it mean for the new recipe to be “more watery” than the original recipe?