National Agricultural Literacy Curriculum Matrix
Enjoying the Harvest
3 - 5
Students will identify the parts of a wheat plant and wheat kernel and investigate the process of milling wheat kernels into flour.
Interest Approach - Engagement:
- Loaf of white bread or photo
- Loaf of whole wheat bread or photo
- Wheat kernels
- White flour
- Whole wheat flour
- Anatomy of a Wheat Plant Diagram, 1 per student
- White Bread vs. Whole Wheat Grain video
- Wheat stem, 1 per student (Wheat stems can be obtained from a local farmer or Wheat Bundles are available for purchase from agclassroomstore.com.)
- Jewel bag*, 1 per student
- 8 1/2" x 11" piece of paper, 1 per student
- Wheat Kernel Dissection Image, 2 per student
- 8 1/2" x 11" piece of lined paper, 3 per student
- Brads, 1 per student
- Glue sticks
- Hole punches
*Jewel bags are available for purchase from agclassroomstore.com.
- Tools for grinding grain (two stones, mortar and pestle, coffee grinder, spice grinder, pepper grinder, hand or electric wheat grinder, etc.)
- A Wheat Grinder Kit is available for purchase from agclassroomstore.com.
- Wheat seeds (Hard red wheat seeds can be purchased from the grocery store.)
- History of Flour Milling Timeline
- Wheat Milling video
- Bread, Bread, Bread by Ann Morris
- Tortillas in a Bag Recipe
- 1-quart plastic resealable storage bag, 1 per group
- Wheat flour, 1 1/2 cups per group (Use the freshly ground wheat flour from Activity 2. Store bought flour can be added to ensure there is enough flour for each group.)
- Baking powder, 1 teaspoon per group
- Shortening, 2 tablespoons per group
- Hot water, 1/2 cup per group
- Salt, 1/4 teaspoon per group
Essential Files (maps, charts, pictures, or documents)
- Whole Wheat Bread Photo
- White Bread Photo
- Wheat Kernel Dissection Image
- Tortillas in a Bag Recipe
- Anatomy of a Wheat Plant Diagram
bran: the multi-layered, hard outer covering of a kernel of cereal grain
endosperm: nutritive matter formed within a seed in seed plants
germ: the embryo of a seed in the seed of a cereal grain
grain: the edible seed or seed-like fruit of grasses that are cereals
mill: a machine used in treating (by grinding, crushing, stamping, cutting, or finishing) raw material
photosynthesis: the process through which a green plant turns water and carbon dioxide into food when the plant is exposed to light
Did you know? (Ag Facts)
- Wheat was first planted in the United States in 1777 as a hobby crop.1
- Today, wheat is grown in 42 states in the United States.1
- In the United States, one acre of wheat yields an average of around 40 bushels of wheat. One bushel of wheat contains approximately one million individual kernels and yields approximately 42 pounds of white flour or 60 pounds of whole wheat flour.1
- Ancient traditional tortillas in Mexico were made from ground corn. Flour tortillas only started to become popular in the 19th century.1
Background Agricultural Connections
Interest Approach – Engagement
- Show the students a loaf of white bread and a loaf of wheat bread, or use the attached photos. Draw a Venn diagram on the board. Label one circle "White Bread" and the other circle "Whole Wheat Bread."
- Ask the students to explain what is the same and different about the two loaves of bread, and record the responses in the appropriate spots of the graphic organizer.
- Show the students a bowl of wheat kernels, a bowl of white all-purpose flour, and a bowl of whole wheat flour. Point out that the white flour was used to make the white bread and the whole wheat flour was used to make the whole wheat bread, but both types of flour were made from wheat kernels. Explain to the students that they will be exploring the process of making flour, known as milling, to understand how different types of flour are made from wheat kernels.
Activity 1: Wheat Kernel Dissection Model
- Provide each student with the Anatomy of a Wheat Plant Diagram, a wheat stem, and a jewel bag. Use the diagram to discuss the main parts of a wheat plant and have the students locate the parts on the wheat stem.
- Tell the students to thresh their wheat to separate the seeds from the plant. Refer to the Wheat Grinding Tutorial Video for instructions on how to thresh wheat by hand. The students should collect the wheat seeds in their jewel bags.
- Explain to the students that each kernel of wheat has three main parts—the bran, germ, and endosperm. All-purpose flour, used to make white bread, is made from the endosperm of the wheat kernel. The endosperm is separated from the bran and the germ and ground into flour. Whole wheat flour contains the whole kernel—the bran, germ, and endosperm.
- Pass out a piece of paper to each student. Instruct them to fold the paper into thirds and label the sections "Bran," "Germ," and "Endosperm." Using the information from the Background Agricultural Connections section of this lesson, discuss the three parts of the wheat kernel and have the students take notes about each part on their paper.
- Show the students the video White Bread vs. Whole Wheat (Grain) and have them take additional notes about the three parts of the wheat kernel.
- Provide each student with two copies of the Wheat Kernel Dissection Image, three pieces of lined paper, a brad, scissors, and a glue stick. Have them cut out both of the Wheat Kernel Dissection Images. Trace one of the images onto three pieces of lined paper, cut each lined kernel out, and number each page. Set one of the Wheat kernel Dissection Images aside and cut the bran, germ, and endosperm apart from the other.
- Glue the bran image on page 1 of the lined kernels, the germ on page 2, and the endosperm on page 3.
- Using their notes, have the students write a description of each part of the wheat kernel on the corresponding page.
- Layer the wheat kernel model with the jewel bag of wheat seeds on top followed by the intact Wheat Kernel Dissection Image, page 1, 2, and 3. Punch a hole in the top of the packet and attach with a brad.
Activity 2: From Grind Stones to Roller Mills
- Choose a minimum of three tools for grinding grain and place them on tables around the room with a bag of wheat kernels and a bowl to collect flour at each station.
- Have students try their hands at milling flour with the different tools by allowing them to circulate through the stations. Save any flour that is successfully produced to be used in Activity 3.
- After every student has had a turn at each station, invite the class to describe their experiences with each tool. Ask students which method they thought was most effective and if they can think of any better ways to grind wheat.
- Explain that thousands of years ago, people used stones to crush grain into flour. Over time, more productive machines were invented. Use the History of Flour Milling Timeline to view and discuss the different technologies used throughout history to mill flour.
- Show the students the video Wheat Milling to view a modern flour mill at work.
Activity 3: Tortillas in a Bag
- Read the book Bread, Bread, Bread by Ann Morris and discuss the different types of bread from around the world that are featured in the book.
- Tell the students that they are going to use the wheat flour they made in Activity 2 to make tortillas, a type of bread from Mexico. Explain that the tortillas will be whole wheat tortillas because the flour they milled contains the bran, germ, and endosperm of the wheat kernel.
- Gather the ingredients listed in the Activity 3 section of the Materials list and have students wash their hands.
- Divide students into small groups. Provide each group with a Tortillas in a Bag Recipe, the ingredients listed on the recipe, and a 1-quart plastic resealable storage bag.
- Model each instruction on the recipe for the students before they begin.
- Place the wheat flour, salt, and baking powder in a 1-quart resealable storage bag. Close the bag and shake just a few shakes to mix the ingredients.
- Add the shortening and close the bag. From the outside of the bag, work the bag with your hands until the mixture looks crumbly and there are no pieces of the shortening visible.
- Open the bag and add the hot water. Knead the bag until the dough is one large piece and the sides of the bag come clean.
- Take the dough out of the bag and divide it into four equal pieces. Lay the dough on a tray and place the bag on top of the pieces. Allow the dough to rest for 15 minutes.
- After the dough has rested, have the groups roll or pat it into 8-10 inch circles. If the dough is too sticky, add more flour.
- Heat the griddle to medium or medium high. Place the dough onto the griddle and cook until dark brown spots appear. Turn and cook on the other side.
Concept Elaboration and Evaluation
After conducting these activities, review and summarize the following key concepts:
- The seeds or kernels of the wheat plant are located in the head of the wheat stalk.
- Each kernel of wheat has three main parts—the bran, germ, and endosperm.
- The flour used to make white bread is made from grinding the endosperm of the kernel.
- The flour used to make whole wheat bread is made from grinding the whole kernel—the bran, germ, and endosperm.
We welcome your feedback! Please take a minute to tell us how to make this lesson better or to give us a few gold stars!
Have students research the nutritional differences between white bread and whole wheat bread.
Play the My American Farm interactive game Amazing Grains.
View the video How It's Made Flour to learn more about how wheat kernels are milled into flour.
Sprout wheat kernels to grow wheat grass.
- Rinse wheat kernels thoroughly in a colander.
- Place the rinsed wheat kernels in a container and cover with water.
- Soak overnight.
- Rinse the wheat kernels again.
- Cover the opening of the container with a piece of cheesecloth and secure with a rubber band.
- Lay the container on its side in a dark place.
- Rinse and drain the berries each morning until they sprout and grow to about one inch in length.
- When the sprouts have grown to about one inch in length, place the container in a sunny window for one day.
- Enjoy your wheat grass on a sandwich, salad, or make wheat grass smoothies.
Suggested Companion Resources
- Bread In A Bag (Activity)
- A True Book: Wheat (Book)
- Bread Comes to Life (Book)
- Bread Lab! (Book)
- Bread is for Eating (Book)
- Bread, Bread, Bread (Book)
- Everybody Bakes Bread (Book)
- From Wheat to Bread (Book)
- The Boy Who Changed the World (Book)
- Wheat Bundle (Kit)
- Wheat Germ DNA Necklace (Kit)
- Wheat Grinder (Kit)
- Wheat Kernel Samples (Kit)
- Amazing BREAD Processing- How It's Made Inside a Factory (Multimedia)
- America's Heartland: Wheat Harvest (Multimedia)
- Bread Comes to Life (Multimedia)
- Wheat (Multimedia)
- My American Farm (Website)
Agricultural Literacy Outcomes
Plants and Animals for Food, Fiber & Energy
- Discuss similarities and differences in food, clothing and shelter, and fuel sources among world cultures (T2.3-5.a)
Education Content Standards
4-LS1: From Molecules to Organisms: Structures and Processes
4-LS1-1Construct an argument that plants and animals have internal and external structures that function to support survival, growth, behavior, and reproduction.
Common Core Connections
Reading: Anchor Standards
CCSS.ELA-LITERACY.CCRA.R.1Read closely to determine what the text says explicitly and to make logical inferences from it; cite specific textual evidence when writing or speaking to support conclusions drawn from the text.
CCSS.ELA-LITERACY.CCRA.R.2Determine central ideas or themes of a text and analyze their development; summarize the key supporting details and ideas.
Writing: Anchor Standards
CCSS.ELA-LITERACY.CCRA.W.4Produce clear and coherent writing in which the development, organization, and style are appropriate to task, purpose, and audience.
Mathematics: Practice Standards
CCSS.MATH.PRACTICE.MP5Use appropriate tools strategically. Students consider the available tools when solving a mathematical problem. These tools might include pencil and paper, concrete models, a ruler, a protractor, a calculator, a spreadsheet, a computer algebra system, a statistical package, or dynamic geometry software. Students at various grade levels are able to identify relevant external mathematical resources, such as digital content located on a website, and use them to pose or solve problems. They are able to use technological tools to explore and deepen their understandings of concepts.
CCSS.MATH.PRACTICE.MP6Attend to precision. Students try to communicate precisely to others. They try to use clear definitions in discussion with others and in their own reasoning. They state the meaning of the symbols they choose, including using the equal sign consistently and appropriately. They are careful about specifying units of measure, and labeling axes to clarify the correspondence with quantities in a problem. They calculate accurately and efficiently, express numerical answers with a degree of precision appropriate for the problem context.