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Third Grade Lesson Plans (56 results)

Science Buddies' third grade science projects are the perfect way for third grade students to have fun exploring science, technology, engineering, and math (STEM). Our third grade projects are written and tested by scientists and are specifically created for use by students in the third grade. Students can choose to follow the science experiment as written or put their own spin on the project.

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2026 Ball Run Challenge for Grades K-5
Lesson Plan Grade: Kindergarten-5th
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7 reviews
Add a twist to a classic activity with this fun lesson plan. Your students will design and build a ball run for a ping pong ball using nothing but paper and tape. Their goal is to make the slowest ball run possible. How long can they make it take for the ball to go through their ball run? An optional variation is available if you would like to give students an extra challenge. The 2026 Engineering Challenge has ended. You can still do this challenge with students informally. Read more
NGSS Performance Expectations:
  • 3-5-ETS1-2. Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem.
Make an Anemometer to Measure Wind Speed
Lesson Plan Grade: 3rd
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19 reviews
Help the budding meteorologists in your classroom learn how to measure wind speed by building their own anemometers (wind speed meters) with paper cups and straws. Then do a simple experiment in which students change the "wind" speed using a fan and measure how fast their anemometer spins. Read more
NGSS Performance Expectations:
  • 3-ESS2-1. Represent data in tables and graphical displays to describe typical weather conditions expected during a particular season.
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Flowers Seeking Pollinators
Lesson Plan Grade: 3rd-7th
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9 reviews
"European honey bee extracts nectar" by John Severns In this activity, students learn about plant reproduction and use real data to construct explanations about which flowers are the most attractive to different pollinators. Read more
NGSS Performance Expectations:
  • 3-LS1-1. Develop models to describe that organisms have unique and diverse life cycles but all have in common birth, growth, reproduction, and death.
  • 4-LS1-1. Construct an argument that plants and animals have internal and external structures that function to support survival, growth, behavior, and reproduction.
  • MS-LS1-4. Use argument based on empirical evidence and scientific reasoning to support an explanation for how characteristic animal behaviors and specialized plant structures affect the probability of successful reproduction of animals and plants, respectively.
Invent an Insect
Lesson Plan Grade: 2nd-5th
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8 reviews
"Grasshopper" by Ryan Wood There are thousands of species of insects in our world, and each are adapted to survive in their habitat. In this activity, students will learn what an insect is and what some of their adaptations are. Then they will put their knowledge into play by "creating" an insect that is adapted to live in their assigned environment. Read more
Tallest Paper Tower Challenge for Grades 3-5
Lesson Plan Grade: 3rd-5th
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10 reviews
Teach your students about the engineering design process with this fun lesson plan. They will design and build the tallest possible tower using nothing but paper and tape, but there's an additional twist on this classic activity. The tower must support a heavy weight at the top without collapsing! Teachers, note that middle school and high school versions of this lesson plan are also available. The 2021 Engineering Challenge is over, but you can still try this fun lesson with your students,… Read more
NGSS Performance Expectations:
  • 3-5-ETS1-3. Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved.
Defining an Engineering Design Problem with Paper Airplanes
Lesson Plan Grade: 3rd-5th
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27 reviews
Are paper airplanes a nuisance in your classroom? They don't have to be! Those distractions can be a constructive learning opportunity: use them to teach your students about the engineering design process. In this fun lesson, you will be the "customer" ordering a paper airplane, and your student teams will be engineering companies that will manufacture planes. Before they start making planes, they need to define the criteria and constraints of this engineering problem. Read more
NGSS Performance Expectations:
  • 3-5-ETS1-1. Define a simple design problem reflecting a need or a want that includes specified criteria for success and constraints on materials, time, or cost.
Plant Cycles: Photosynthesis & Transpiration
Lesson Plan Grade: 3rd-5th
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2 reviews
What do plants need? Students examine the effects of light and air on green plants, learning the processes of photosynthesis and transpiration. Student teams plant seeds, placing some in sunlight and others in darkness. They make predictions about the outcomes and record ongoing observations of the condition of the stems, leaves and roots. Then, several healthy plants are placed in glass jars with lids overnight. Condensation forms, illustrating the process of… Read more
NGSS Performance Expectations:
  • 5-LS1-1. Support an argument that plants get the materials they need for growth chiefly from air and water.
Stomata Printing: Microscope Investigation
Lesson Plan Grade: 3rd-12th
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4 reviews
"Backlit Leaf" © 2011 Threthny Plants have many crucial roles on our planet, and among these is the gas exchange that happens within their leaves. As plants take in carbon dioxide from our atmosphere, they release oxygen and retain the carbon. In this lesson, students will investigate leaves up close to look for the structures responsible for gas exchange. Read more
Vibrobots— Tiny Robots from Scratch
Lesson Plan Grade: 3rd-5th
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7 reviews
Vibrobots are tiny robots powered by a vibrating motor, like the type found in cell phones. In this lesson plan, your students will learn about engineering design as they build their own vibrobots from craft materials. No previous experience with robots is required! Read more
NGSS Performance Expectations:
  • 3-5-ETS1-2. Generate and compare multiple possible solutions to a problem based on how well each is likely to meet the criteria and constraints of the problem.
Teaching the Scientific Method with Paper Rockets
Lesson Plan Grade: 3rd-5th
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28 reviews
This lesson will introduce your students to the scientific method using a fun, hands-on activity. A middle school version of this lesson plan is also available. Read more
NGSS Performance Expectations:
  • 3-5—Science Practices.
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