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Lesson
- Great Grains
Objectives
- Students
will recognize that their daily food choices affect their overall
health now and in the future.
- Students
will identify the Food Guide Pyramid and be able to explain its
use for making smart food choices.
- Students
will understand that foods are classified into the five food groups
of the Pyramid based on the nutrients they contain.
- Students
will be able to identify foods and nutrients in the Grain Group.
- Students
will be able to identify the recommended number of servings a
day from the Grain Group.
Materials
Needed
Provided in
the Curriculum:
Other
- Cereal packages
- Index cards
- Labeled grain
and sugar measuring cups or 8 ounce paper cups
Materials
adapted from Frischie, S. and Konzelmann, KL. Exploring the Food
Pyramid with Professor Popcorn. Purdue University Cooperative Extension
Service, West Lafayette, IN, 1993.
Introduction
Nutrition is
the study of food and how it is used in the body. Food that you
eat affects the physical activity that you can do. It has
a great influence on how you feel, how you look and how healthy
you will be now and as you get older.
Ask a volunteer
to tell you what she/he ate for her/his last meal (breakfast, lunch
or dinner last night). Comment that the student does not look like
whatever she/he ate (a hamburger, mashed potatoes and an apple,
for example). Ask the students if it is true that "You are
what you eat?". Elicit responses. Yes! The food that
you eat really and truly does turn into you! Explain to students
that the food they eat is like the building materials a carpenter
uses to build a house. If a carpenter uses cardboard and staples
to build a house, it will not be very strong and will not look very
good. So, if you want to look and feel and be the best you can,
you need to know what foods help you look, feel and be your best.
Food Classification
Ask a few students to list foods that begin with the same letter
as their first name. List the students responses under the
letter that starts their name, and do so for a few students. There
are many ways to group foods, such as by the letter that their names
start with. Another way is by their source. Where did the food come
from, a plant or an animal? Classify several of the foods listed
by name by source.
Another way
to classify foods is according to the nutrients they contain. What
are nutrients? Nutrients are chemicals in food that work together
to meet our bodys needs. Carbohydrates, protein, and vitamins,
such as vitamin C and A are examples of nutrients.
Each nutrient
has a specific use in the body, just as cement, wood, nails and
glass have different uses in building a house. Our bodies need many
different nutrients for growth and repair. Foods that have similar
nutrients are grouped together. For example, fruits are very high
in vitamins C and A and in sugars that our bodies use for energy.
Examples of fruits include oranges, apples, peaches and bananas.
Vegetables are high in folate and potassium. Examples of vegetables
include broccoli, spinach, tomatoes, and carrots. Explain that many
foods, like pizza and a sandwich, are made up of foods from different
food groups. They are called combination foods.
Food scientists
have put together a way to group foods that have similar nutrients.
Does anybody know the name of the Food Guide that is used today?
It is called the Food Guide Pyramid. Pass out the Food Guide Pyramid
handout. The food guide pyramid is a shape that is used to help
us make smart food choices. Five groups of food make up the pyramid.
Foods within each group contain similar nutrients.
Highlight
the Grain Group
Did you have toast, a bagel, or a favorite cereal for breakfast
this morning? Maybe you ate pizza, spaghetti, or tacos for lunch
or dinner yesterday? These foods all have something in common. What
is it? They are all from the Grain Group of the Food Guide Pyramid,
which means that they all come from plants called grains. The most
important grains that people use are wheat, corn, rice and oats.
When grain plants grow, they produce a stalk and seeds. The seeds
from grain plants are processed so people can use them for food.
For example, most wheat is made into flour, and corn is ground into
corn meal. They are then used to make bread, spaghetti and breakfast
cereals.
Where is the
Grain Group located in the Food Guide Pyramid? It is on the bottom,
which is the foundation of the Pyramid and the largest food group.
Therefore, most of the foods we eat each day should be from this
group. In fact, we need 6 to 11 servings from the Grain Group each
day. A serving is equal to 1 slice of bread, 1/2 cup of cooked cereal,
rice, or pasta, or 1 ounce of ready to eat cereal. Pass around a
measuring cup or 8 ounce cup and ask students to put their fist
in it. Most adult fists are equivalent in volume to a measuring
cup. Ask the students if their fists take up about 1/2 of the space
in the cup. This is an easy way for them to visualize what 1/2 cup
looks like. Ask students to state some of their favorite grain foods.
Weve thought of many foods that all belong to the Grain Group.
If all of these foods are grouped together, they must have something
in common. What? They supply similar nutrients to the body. Grain
foods, as well as fruits and vegetables, are good sources of carbohydrates.
Carbohydrates
supply the body with energy. Have students stand up and do 5 jumping
jacks. How is it that your body can do this work... move your limbs
through space? It can do this because your muscles store energy
that you use to perform work. You cant see energy but you
can see and feel what can happen when energy is made available.
When a car engine burns gasoline, you see the car move. When wood
is burned, you feel the heat and see the flames. When electricity
is turned on, appliances work and lights shine. When people eat
food, we grow, keep our bodies healthy, and have energy to play
and work. For example, when you throw a ball the muscles in your
arm and shoulder contract and do work.... put the ball in motion.
Energy from the carbohydrates you eat supply the energy for your
muscles to perform this work... without you even having to think
about it. People who are very active, and those that play sports
need even more carbohydrates for the extra energy demands of their
muscles. Carbohydrates also fuel the brain. Cars store fuel in the
gasoline tank. Where do we store our carbohydrate fuel? We store
our carbohydrate fuel in our liver and in our muscles. This stored
carbohydrate fuel is called glycogen. When our body needs energy
we break down the carbohydrate to a type of sugar, called glucose.
When your storage sites are full, your body stores extra fuel as
fat.
There are three
kinds of carbohydrates: sugars, starches and fibers. (Fiber does
not supply energy.) Foods in the grain group that are high
in starch and fiber, and low in sugar and fat are the healthiest.
In addition to carbohydrates, they have the most other nutrients,
like vitamins and minerals, that your body needs to be able to use
the carbohydrate energy, such as B1, B2, B3, and iron. Whole grains
also supply vitamin E, B6, zinc, chromium and manganese. Although
some sugars and fats are found naturally in grains, most of it is
added by the people who manufacture foods. If you eat too many grain
foods with lots of sugar or fat (like cake, and cookies, that are
found in the tip of the Pyramid), your body will store this excess
energy as fat and not get enough vitamins and minerals for you body
to work at its best. Although it is true that when you are growing
and/or very active you can burn off a lot of these calories, keep
in mind that your body needs a lot of vitamins and minerals as well.
Treat your body like a sports car and give it high performance fuel.
Have students
do the Ingredient Lines activity.
Activity
Ingredient
Lines
Cereals are a common grain food. Do you have a favorite breakfast
cereal? Why is it your favorite? Have you ever looked at the cereal
box to see what is in it? The information on the Nutrition Facts
label can help you decide whether a particular cereal is a healthy
choice.
Have the students
form small groups of 6 to 10 students. Give each group a cereal
box. Review the source of grains in cereals by writing the following
terms on the blackboard: oats, corn, rice and wheat. Also review
the source of simple sugars in cereals by writing the following
terms on the blackboard: sugar, corn syrup, high fructose corn syrup,
maple syrup, dextrose, maltose, honey, maltodextrins, and other
words ending in "ose". Have each group make an ingredient
line - one student for each ingredient on the package label, in
order as they are listed. Have the students identify the grain ingredients
and give these students a card with "grain" written on
it. Have the students identify the sugar ingredients, and give these
students a card with "sugar" written on it. Have the class
compare the cereal groups and "ingredient lines". Talk
about healthy cereals. How do you decide what is healthy and what
isnt quite so healthy. Healthier cereals have less types of
sugar added, and the sugar ingredients are at the end of the list.
You can also have students check the total grams of sugar on the
Nutrition Facts food label. Cereals with less that 5 grams of sugar
per ounce or per serving are desirable. Whole grains in the ingredient
list (whole wheat flour, rolled or whole oats etc.) also indicate
a healthier cereal. You can also have the students check the amount
of fiber in the cereal. At least 2 to 3 grams of fiber per serving
is desirable. Ask students to look on their cereal boxes at home,
or those available in the school in the morning. Are they high in
sugar? Are they healthy?
Conclusion
- The Food
Guide Pyramid is a tool to help you choose healthy foods and a
healthy diet.
- There are
5 food groups in the Food Guide Pyramid, Grains, Fruits, Vegetables,
Meats, and Milk Products. In addition, the tip of the Pyramid
includes foods high in fat and/or sugar.
- Six to 11
servings of grains are recommended each day.
- Foods in
the Grain Group are a good source of carbohydrate, which supply
the body with a great source of energy, and lots of vitamins and
minerals.
- Grains that
have a lot of fats or sugars (cakes, cookies, rice pudding) are
found in the tip of the Pyramid.
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