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

For a personalized list of science projects, fourth graders can use the Science Buddies Topic Selection Wizard. The wizard asks students to respond to a series of simple statements and then uses their answers to recommend age-appropriate projects that fit their interests.

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Teaching the Scientific Method with Paper Rockets
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Lesson Plan Grade: 3rd-5th
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2 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.
Tallest Paper Tower Challenge for Grades 3-5
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Lesson Plan Grade: 3rd-5th
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! Optionally, they can enter their designs in the 2021 Fluor Engineering Challenge for a chance to win a cash prize for your school! Teachers, note that middle school and high school versions of… 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
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Lesson Plan Grade: 3rd-5th
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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.
Modeling Blood Flow
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Lesson Plan Grade: 4th
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1 review
Why is it important to eat healthy and exercise? In this hands-on lesson plan, students will build a simple model to explore the effects of plaque buildup in arteries. The model allows them to demonstrate what happens to blood flow when heart disease narrows a person's arteries. Read more
NGSS Performance Expectations:
  • 4-LS1-1. Construct an argument that plants and animals have internal and external structures that function to support survival, growth, behavior, and reproduction.
Lifting with a Lever
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Lesson Plan Grade: 3rd-5th
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Can your students lift a book off the floor with just one finger? Find out and learn about simple machines in this fun lesson plan about levers. 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.
Build a Machine to Lift Water
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Lesson Plan Grade: 4th-8th
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What would your students do if your town's water supply was cut off due to an equipment failure or natural disaster? Inspired by Global Problem Solvers: The Series, in this lesson plan they will tackle a real-world engineering challenge by building a prototype of a device that can manually pump water during an emergency. They will also think like entrepreneurs and come up with a business plan for how their device could be produced, sold, and used in the real world. This lesson is one of… 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.
  • 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.
  • 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.
  • MS-ETS1-1. Define the criteria and constraints of a design problem with sufficient precision to ensure a successful solution, taking into account relevant scientific principles and potential impacts on people and the natural environment that may limit possible solutions.
  • MS-ETS1-2. Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem.
  • MS-ETS1-4. Develop a model to generate data for iterative testing and modification of a proposed object, tool, or process such that an optimal design can be achieved.
Invent an Insect
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Lesson Plan Grade: 2nd-5th
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
Vibrobots— Tiny Robots from Scratch
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Lesson Plan Grade: 3rd-5th
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.
Brainstorming for Engineering Projects using SCAMPER
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Lesson Plan Grade: 3rd-8th
Coming up with new ideas is hard! How do engineers design new things or improve existing ones? Engineers and inventors use different brainstorming techniques to help them think outside the box and come up with new ideas. In this lesson plan, your students will practice brainstorming with a method called SCAMPER. Read more
Measuring Heart Rate with Your Own Stethoscope
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Lesson Plan Grade: 4th
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1 review
In this fun, hands-on lesson, students explore their heartbeats and learn about blood circulation. They will make their own stethoscopes, use them to measure their heart rates and investigate how heart rate is affected by exercise. Read more
NGSS Performance Expectations:
  • 4-LS1-1. Construct an argument that plants and animals have internal and external structures that function to support survival, growth, behavior, and reproduction.
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