Balanced Diet Balanced by benbenzhou


Balanced Diet

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									                                   Balanced Diet
                        Anita Watkins     Jo Anne Cornett     Susan Pavetto

Class: Pre-algebra, but could be extended to almost any level of math class.

Materials: Chart on nutritional information (to be photocopied and distributed to each group),
graphing materials (anything from graph paper to computer software), and calculators (optional).

Goals: The mathematics that is covered in this project involves basic addition, reasoning skills
to identify combinations of high/low values, possible ratios, gathering data from a table of
values, and creating double bar graphs. The students will work on this project with at least one
other person; therefore their group skills can be exercised, and each person will be able to
practice their communication skills both in the oral presentation and the required write-up. The
students should also gain a better understanding of nutrition. This project will reinforce the five
food groups, and students will be able to see a connection between mathematics and health.

Time required: One day in class, two-three days out of class, and one day to present and

Background: The students should be familiar with basic addition, division to find ratios (if
discovered), the ability to read a table of values, and the ability to create a double bar graph.
Mastery of the skills above is not necessary because one goal of this project is for students to
work on the skills above using a real-life situation.

Setting: Your school cafeteria needs your help in putting together menus with the least amount
of calories and the most amount of protein. Each group of students will receive a table
consisting of three items from each of the 5 food groups, and a table giving the calorie and
protein content per serving of a variety of foods.

Problem: Students will choose 5 balanced meals, meaning one food from each food group. Out
of the 5 chosen, each group will find the calorie and protein content for each meal. Students
should graph each meal comparing calories and protein (as a double bar graph). From the graph
students should pick the "best" meal (meaning lowest amount of calories and highest amount of
protein). Students may even find ratios to be helpful in their decision. Each group will present
their solutions and justify their choices in an oral presentation. Visual aids should be the graph
they made earlier. Clarification of write-up is included in the student resource.

Evaluation: Evaluation will be based upon a rubric, which is on a separate sheet of paper. The
evaluation includes two parts, one for the write-up and one for the oral presentation.

Funded in part by the National Science Foundation and Indiana University 1995
Extensions: (1) give students price items and have them stay within a budget., (2) give different
combinations of nutritional information, (3) determine the amount of food needed to supply
school cafeteria, and (4) determine all possible combinations of meals in the original project.

Funded in part by the National Science Foundation and Indiana University 1995
                                   Balanced Diet
                                          Student Page

The cafeteria wants to make new and improved menus that include foods from the five basic
food groups. Listed below are options for the cafeteria to choose from given budget constraints.
To continue federal funding, a balanced diet must be offered. A balanced meal consists of one
serving of food from each of the five food groups. It is your job to come up with five balanced
meals and find the total calories and protein for each of the meals. From these five meals you are
to make a double bar graph showing the calorie and protein totals for each meal. Utilizing the
graph, decide which of the five meal plans is lowest in calories and highest in protein.

Your group must turn in a written summary of this project. Included in this written summary
should be: 1) a description of each meal, 2) calorie and protein totals for each meal, 3) a double
bar graph, and 4) your choice of the "best" meal, including a justification of why you chose that
meal. Your group will also make an oral presentation to the class. Visual aids should be
included in your presentation. The foods that the cafeteria can choose from are indicated in the
charts below:

Meats                   Fruit & Veggies              Dairy        Grains        Fats
Fried chicken breasts   Apples                Low-fat milk White bread   Butter
Broiled pork chops      Green beans           Skim milk      Rice        Margarine
Roasted turkey          French fries          Chocolate milk             Chocolate chip cookies
Student Evaluation: Your group will be evaluated in the following areas.
1. completeness           0      1       2       3
2. use correct figures 0  1      2       3
3. tally correctly        0      1       2       3
4. bar graph
   a. complete            0      1       2       3
   b. reflects data       0      1       2       3
Writing skills
1. sequential & logical   0      1       2       3
2. followed guidelines    0      1       2       3
1. reasonable             0      1       2       3
2. justified              0      1       2       3
Oral presentation
1. delivery               0      1       2       3
2. explanation         0  1      2       3
3. visual aids            0      1       2       3

Funded in part by the National Science Foundation and Indiana University 1995

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