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Ready-Set-Tech: Feed The Whole Class

Ann Stephenson, Charles R. Hadley Elementary, Miami, FL

Grade Level  4th - 5th
Subject Mathematics
Background Students learn how to multiply fractions by increasing a recipe in this fun online lesson. Each student is asked to search online for a recipe, and students visit these food web sites: All Recipes  and The Food Network at . During the lesson, one of the boys asked if he could bring the actual food so the children could taste it. When he did, his recipe was partially in Spanish, so we looked for the meaning of the words in an online English and Spanish dictionary called Online Free Dictionary.

To solve word problems involving fractions and mixed numbers
To determine quotients of common fractions and mixed numbers

Materials Computer with Internet access, recipes, Feed the Whole Class Work Sheet
  1. Student or teacher provides a taste of coconut custard (or other recipe).
  2. The teacher explains that in order to make enough food for a class of thirty-eight students, the original recipe that serves six, needs to be increased.
  3. She elicits responses from the children and shows how the increase is made.
  4. The students then are shown how to multiply each fraction and whole number  by the number needed to increase the recipe.
  5. Each student will then use his or her recipe and increase it by the number  necessary using the Feed the Whole Class Work Sheet.
  6. They will ask themselves the question, "Are my results reasonable?"
  7. If not, they will have to re-multiply.

Tembleque (Coconut Custard)
1 can coconut milk
2- 1/2 cups water
1-cup sugar
2/3 cup maicena (cornstarch)
1/2 tsp. salt
1 tsp. vanilla
cinnamon to taste

Cook the sugar in a pot until it turns brown.

Mix the cornstarch with water in a bowl. Stir.

Add it to the sugar, salt and vanilla and cook at low temperature, stirring constantly.

Add cinnamon to taste and serve cold.

Evaluation Students will use calculators found on the computer to check to see if the increase is accurate. Students will check each other’s answer and share results with class.


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