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FREE Gizmos

Explore free Gizmos for STEM learning

Access a rotating selection of free Gizmos from our extensive library of over 550 interactive math and science simulations, designed to enhance STEM education for students in grades 3-12. Each Gizmo includes comprehensive teaching resources, such as customizable lesson materials and teacher guides, to facilitate seamless classroom integration.

See How FREE Gizmos Work
Free Gizmos Will Change on Jul 01, 2025

Modeling Decimals (Area and Grid Models)

FREE with no time limit!

Model and compare decimals using area models. Set the number of sections in each model to 1, 10, or 100, and then click in the models to shade sections. Compare decimals visually and on a...

Lesson Info Launch Gizmo

Rock Art (Transformations)

FREE with no time limit!

Create your own rock art with ancient symbols. Each symbol can be translated, rotated, and reflected. After exploring each type of transformation, see if you can use them to match ancient...

Lesson Info Launch Gizmo

Elevator Operator (Line Graphs)

FREE with no time limit!

Operate an elevator in an old apartment building. Pick up and drop off residents where they want to go. A line graph shows where the elevator traveled over time. Operate the elevator either...

Lesson Info Launch Gizmo

Fraction Artist 2 (Area Models of Fractions)

FREE with no time limit!

Extend understanding of fractions by making modern paintings in the style of Piet Mondrian. Create and analyze paintings with different-sized sections. Compare the sizes of unit fractions....

Lesson Info Launch Gizmo

Eyes and Vision 1 - Seeing Color

  • New!

FREE with no time limit!

Observe how different colors of light are reflected or absorbed by colored objects. Determine that white light is a combination of different colors of light, and that one or more component...

Lesson Info Launch Gizmo

Building Pangaea

FREE with no time limit!

In 1915, Alfred Wegener proposed that all of Earth's continents were once joined in an ancient supercontinent he called Pangaea. Wegener's idea of moving continents led to the modern theory...

Lesson Info Launch Gizmo

Phases of Water

FREE with no time limit!

Heat or cool a container of water and observe the phase changes that take place. Use a magnifying glass to observe water molecules as a solid, liquid, or gas. Compare the volumes of the...

Lesson Info Launch Gizmo

Triple Beam Balance

FREE with no time limit!

Learn how to determine the mass of an object using a triple beam balance. The mass of a variety of objects can be determined using this simulated version of a common real-world laboratory...

Lesson Info Launch Gizmo

Elapsed Time

FREE with no time limit!

Calculate the difference between the times given by two analog clocks. Rotate the hands of the clocks to change the time and see how the calculation changes.

Lesson Info Launch Gizmo

Reaction Time 1 (Graphs and Statistics)

FREE with no time limit!

Test your reaction time by catching a falling ruler or clicking a target. Create a data set of experiment results, and calculate the range, mode, median, and mean of your data. Data can be...

Lesson Info Launch Gizmo

Correlation

FREE with no time limit!

Explore the relationship between the correlation coefficient of a data set and its graph. Fit a line to the data and compare the least-squares fit line.

Lesson Info Launch Gizmo

Introduction to Functions

FREE with no time limit!

Determine if a relation is a function using the mapping diagram, ordered pairs, or the graph of the relation. Drag arrows from the domain to the range, type in ordered pairs, or drag points...

Lesson Info Launch Gizmo

Multiplying Fractions

FREE with no time limit!

Multiply two fractions using an area model. Vary the vertical area to change one fraction and vary the horizontal area to change the other. Then examine the intersection of the areas to...

Lesson Info Launch Gizmo

Area of Triangles

FREE with no time limit!

Use a dynamic triangle to explore the area of a triangle. With the help of an animation, see that any triangle is always half of a parallelogram (with the same base and height). Likewise, a...

Lesson Info Launch Gizmo

Histograms

FREE with no time limit!

Change the values in a data set and examine how the dynamic histogram changes in response. Adjust the interval size of the histogram and see how the shape of the histogram is affected.

Lesson Info Launch Gizmo

Muscles and Bones

  • New!

FREE with no time limit!

See how muscles, bones, and connective tissue work together to allow movement. Observe how muscle contraction arises from the interactions of thin and thick filaments in muscle cells. Using...

Lesson Info Launch Gizmo

Carbon Cycle

FREE with no time limit!

Follow the path of a carbon atom through the atmosphere, biosphere, hydrosphere, and geosphere. Manipulate a simplified model to see how human activities and other factors affect the amount...

Lesson Info Launch Gizmo

Boyle's Law and Charles's Law

FREE with no time limit!

Investigate the properties of an ideal gas by performing experiments in which the temperature is held constant (Boyle's Law), and others in which the pressure remains fixed (Charles's Law)....

Lesson Info Launch Gizmo

Sound Off, Please!: Designing Solutions to Reduce Noise Pollution

  • Stem Case

Video Preview

As an acoustic engineer, students will work with an urban planner to learn how noise pollution impacts a community. Students will develop a system model to test design solutions. Wave...

Lesson Info

Linear Programming

FREE with no time limit!

Use the graph of the feasible region to find the maximum or minimum value of the objective function. Vary the coefficients of the objective function and vary the constraints. Explore how...

Lesson Info Launch Gizmo

Zap It! Game

FREE with no time limit!

Adjust the values in a quadratic function, in vertex form or in polynomial form, to "zap" as many data points as possible.

Lesson Info Launch Gizmo

Point-Slope Form of a Line

FREE with no time limit!

Compare the point-slope form of a linear equation to its graph. Vary the coefficients and explore how the graph changes in response.

Lesson Info Launch Gizmo

Pythagorean Theorem with a Geoboard

FREE with no time limit!

Build right triangles in an interactive geoboard and build squares on the sides of the triangles to discover the Pythagorean Theorem.

Lesson Info Launch Gizmo

Graphs of Polynomial Functions

FREE with no time limit!

Study the graphs of polynomials up to the fourth degree. Vary the coefficients of the equation and investigate how the graph changes in response. Explore things like intercepts, end...

Lesson Info Launch Gizmo

Photosynthesis

  • Stem Case

Video Preview

As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching.

Lesson Info

Hurricane Motion

FREE with no time limit!

Use data from up to three weather stations to predict the motion of a hurricane. The wind speed, wind direction, cloud cover and air pressure are provided for each station using standard...

Lesson Info Launch Gizmo

Stoichiometry

FREE with no time limit!

Solve problems in chemistry using dimensional analysis. Select appropriate tiles so that units in the question are converted into units of the answer. Tiles can be flipped, and answers...

Lesson Info Launch Gizmo

Ripple Tank

FREE with no time limit!

Study wave motion, diffraction, interference, and refraction in a simulated ripple tank. A wide variety of scenarios can be chosen, including barriers with one or two gaps, multiple wave...

Lesson Info Launch Gizmo

Fingerprinting

  • New!

FREE with no time limit!

Collect fingerprints from simulated crime scenes using a camera, fingerprinting powder, and tape. Classify fingerprints into groups and subgroups, then identify minutiae. Match collected...

Lesson Info Launch Gizmo

Fast Plants® 1 - Growth and Genetics

  • New!

FREE with no time limit!

Grow Wisconsin Fast Plants® in a simulated lab environment. Explore the life cycles of these plants and how their growth is influenced by light, water, and crowding. Practice pollinating...

Lesson Info Launch Gizmo

Fast Plants® 2 - Mystery Parent

  • New!

FREE with no time limit!

In this follow-up to Fast Plants® 1 - Growth and Genetics, continue to explore inheritance of traits in Wisconsin Fast Plants. Infer the genotype of a "mystery P2 parent" of a set of Fast...

Lesson Info Launch Gizmo

Photosynthesis

  • Stem Case

Video Preview

As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching.

Lesson Info
  • Free!
Modeling Decimals (Area and Grid Models)
  • Free!
Rock Art (Transformations)
  • Free!
Elevator Operator (Line Graphs)
  • Free!
Fraction Artist 2 (Area Models of Fractions)
  • Free!
  • New!
Eyes and Vision 1 - Seeing Color
  • Free!
Building Pangaea
  • Free!
Phases of Water
  • Free!
Triple Beam Balance
  • Free!
Elapsed Time
  • Free!
Reaction Time 1 (Graphs and Statistics)
  • Free!
Correlation
  • Free!
Introduction to Functions
  • Free!
Multiplying Fractions
  • Free!
Area of Triangles
  • Free!
Histograms
  • Free!
  • New!
Muscles and Bones
  • Free!
Carbon Cycle
  • Free!
Boyle's Law and Charles's Law
  • Free!
  • Stem Case
Sound Off, Please!: Designing Solutions to Reduce Noise Pollution
  • Free!
Linear Programming
  • Free!
Zap It! Game
  • Free!
Point-Slope Form of a Line
  • Free!
Pythagorean Theorem with a Geoboard
  • Free!
Graphs of Polynomial Functions
  • Free!
  • Stem Case
Photosynthesis
  • Free!
Hurricane Motion
  • Free!
Stoichiometry
  • Free!
Ripple Tank
  • Free!
  • New!
Fingerprinting
  • Free!
  • New!
Fast Plants® 1 - Growth and Genetics
  • Free!
  • New!
Fast Plants® 2 - Mystery Parent
  • Free!
  • Stem Case
Photosynthesis

Sorry, we could not find any Upcoming Free Gizmos to show you!

Sorry, we could not find any Upcoming Free Gizmos to show you!

How Free Gizmos Work

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Start teaching with 20-40 Free Gizmos. See the full list.

Lesson materials list icon

Access lesson materials for Free Gizmos including teacher guides, lesson plans, and more.

Time icon

All other Gizmos are limited to a 5 Minute Preview and can only be used for 5 minutes a day.

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Free Gizmos change each semester. The new collection will be available January 1 and July 1.

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About STEM Cases

Students assume the role of a scientist trying to solve a real world problem. They use scientific practices to collect and analyze data, and form and test a hypothesis as they solve the problems.

Realtime reporting icon

Each STEM Case uses realtime reporting to show live student results.
Introduction to the Heatmap

Time icon

STEM Cases take between 30-90 minutes for students to complete, depending on the case.

Save icon

Student progress is automatically saved so that STEM Cases can be completed over multiple sessions.

Grades icon

Multiple grade-appropriate versions, or levels, exist for each STEM Case.

Handbook icon

Each STEM Case level has an associated Handbook. These are interactive guides that focus on the science concepts underlying the case.

STEM Case Help & Resources Sign Up for Free
Modeling Decimals (Area and Grid Models) screenshot

Modeling Decimals (Area and Grid Models)

FREE with no time limit!

Model and compare decimals using area models. Set the number of sections in each model to 1, 10, or 100, and then click in the models to shade sections. Compare decimals visually and on a number line.

Lesson Info Launch Gizmo
Rock Art (Transformations) screenshot

Rock Art (Transformations)

FREE with no time limit!

Create your own rock art with ancient symbols. Each symbol can be translated, rotated, and reflected. After exploring each type of transformation, see if you can use them to match ancient rock paintings.

Lesson Info Launch Gizmo
Elevator Operator (Line Graphs) screenshot

Elevator Operator (Line Graphs)

FREE with no time limit!

Operate an elevator in an old apartment building. Pick up and drop off residents where they want to go. A line graph shows where the elevator traveled over time. Operate the elevator either by using the standard up and down controls, or by building a graph to program where you want it to go.

Lesson Info Launch Gizmo
Fraction Artist 2 (Area Models of Fractions) screenshot

Fraction Artist 2 (Area Models of Fractions)

FREE with no time limit!

Extend understanding of fractions by making modern paintings in the style of Piet Mondrian. Create and analyze paintings with different-sized sections. Compare the sizes of unit fractions. Find creative ways to color one-half of a painting. This can be a nice introduction to adding fractions with unlike denominators.

Lesson Info Launch Gizmo
Eyes and Vision 1 - Seeing Color screenshot

Eyes and Vision 1 - Seeing Color

  • New!

FREE with no time limit!

Observe how different colors of light are reflected or absorbed by colored objects. Determine that white light is a combination of different colors of light, and that one or more component colors may be reflected when white light is shone on an object. Understand that we see an object when light reflected from the object enters our eye.

Lesson Info Launch Gizmo
Building Pangaea screenshot

Building Pangaea

FREE with no time limit!

In 1915, Alfred Wegener proposed that all of Earth's continents were once joined in an ancient supercontinent he called Pangaea. Wegener's idea of moving continents led to the modern theory of plate tectonics. Create your own version of Pangaea by fitting Earth's landmasses together like puzzle pieces. Use evidence from fossils, rocks, and glaciers to refine your map.

Lesson Info Launch Gizmo
Phases of Water screenshot

Phases of Water

FREE with no time limit!

Heat or cool a container of water and observe the phase changes that take place. Use a magnifying glass to observe water molecules as a solid, liquid, or gas. Compare the volumes of the three phases of water.

Lesson Info Launch Gizmo
Triple Beam Balance screenshot

Triple Beam Balance

FREE with no time limit!

Learn how to determine the mass of an object using a triple beam balance. The mass of a variety of objects can be determined using this simulated version of a common real-world laboratory tool for measurement.

Lesson Info Launch Gizmo
Elapsed Time screenshot

Elapsed Time

FREE with no time limit!

Calculate the difference between the times given by two analog clocks. Rotate the hands of the clocks to change the time and see how the calculation changes.

Lesson Info Launch Gizmo
Reaction Time 1 (Graphs and Statistics) screenshot

Reaction Time 1 (Graphs and Statistics)

FREE with no time limit!

Test your reaction time by catching a falling ruler or clicking a target. Create a data set of experiment results, and calculate the range, mode, median, and mean of your data. Data can be displayed on a list, table, bar graph or dot plot. The Reaction Time 1 Student Exploration focuses on range, mode, and median.

Lesson Info Launch Gizmo
Correlation screenshot

Correlation

FREE with no time limit!

Explore the relationship between the correlation coefficient of a data set and its graph. Fit a line to the data and compare the least-squares fit line.

Lesson Info Launch Gizmo
Introduction to Functions screenshot

Introduction to Functions

FREE with no time limit!

Determine if a relation is a function using the mapping diagram, ordered pairs, or the graph of the relation. Drag arrows from the domain to the range, type in ordered pairs, or drag points to the graph to add inputs and outputs to the relation.

Lesson Info Launch Gizmo
Multiplying Fractions screenshot

Multiplying Fractions

FREE with no time limit!

Multiply two fractions using an area model. Vary the vertical area to change one fraction and vary the horizontal area to change the other. Then examine the intersection of the areas to find the product.

Lesson Info Launch Gizmo
Area of Triangles screenshot

Area of Triangles

FREE with no time limit!

Use a dynamic triangle to explore the area of a triangle. With the help of an animation, see that any triangle is always half of a parallelogram (with the same base and height). Likewise, a similar animation shows the connection between parallelograms and rectangles.

Lesson Info Launch Gizmo
Histograms screenshot

Histograms

FREE with no time limit!

Change the values in a data set and examine how the dynamic histogram changes in response. Adjust the interval size of the histogram and see how the shape of the histogram is affected.

Lesson Info Launch Gizmo
Muscles and Bones screenshot

Muscles and Bones

  • New!

FREE with no time limit!

See how muscles, bones, and connective tissue work together to allow movement. Observe how muscle contraction arises from the interactions of thin and thick filaments in muscle cells. Using what you have learned, construct an arm that can lift a weight or throw a ball. Connective tissue, muscle composition, bone length, and tendon insertion point can all be manipulated to create an arm to lift the heaviest weight or throw a ball the fastest.

Lesson Info Launch Gizmo
Carbon Cycle screenshot

Carbon Cycle

FREE with no time limit!

Follow the path of a carbon atom through the atmosphere, biosphere, hydrosphere, and geosphere. Manipulate a simplified model to see how human activities and other factors affect the amount of atmospheric carbon today and in the future.

Lesson Info Launch Gizmo
Boyle's Law and Charles's Law screenshot

Boyle's Law and Charles's Law

FREE with no time limit!

Investigate the properties of an ideal gas by performing experiments in which the temperature is held constant (Boyle's Law), and others in which the pressure remains fixed (Charles's Law). The pressure is controlled through the placement of masses on the lid of the container, and temperature is controlled with an adjustable heat source. Gay-Lussac's law relating pressure to temperature can also be explored by keeping the volume constant.

Lesson Info Launch Gizmo
Sound Off, Please!: Designing Solutions to Reduce Noise Pollution screenshot

Sound Off, Please!: Designing Solutions to Reduce Noise Pollution

  • Stem Case

Video Preview

As an acoustic engineer, students will work with an urban planner to learn how noise pollution impacts a community. Students will develop a system model to test design solutions. Wave properties of sound and how sound interacts with different surfaces will be explored and used as evidence to reduce noise pollution.

Lesson Info
Linear Programming screenshot

Linear Programming

FREE with no time limit!

Use the graph of the feasible region to find the maximum or minimum value of the objective function. Vary the coefficients of the objective function and vary the constraints. Explore how the graph of the feasible region changes in response.

Lesson Info Launch Gizmo
Zap It! Game screenshot

Zap It! Game

FREE with no time limit!

Adjust the values in a quadratic function, in vertex form or in polynomial form, to "zap" as many data points as possible.

Lesson Info Launch Gizmo
Point-Slope Form of a Line screenshot

Point-Slope Form of a Line

FREE with no time limit!

Compare the point-slope form of a linear equation to its graph. Vary the coefficients and explore how the graph changes in response.

Lesson Info Launch Gizmo
Pythagorean Theorem with a Geoboard screenshot

Pythagorean Theorem with a Geoboard

FREE with no time limit!

Build right triangles in an interactive geoboard and build squares on the sides of the triangles to discover the Pythagorean Theorem.

Lesson Info Launch Gizmo
Graphs of Polynomial Functions screenshot

Graphs of Polynomial Functions

FREE with no time limit!

Study the graphs of polynomials up to the fourth degree. Vary the coefficients of the equation and investigate how the graph changes in response. Explore things like intercepts, end behavior, and even near-zero behavior.

Lesson Info Launch Gizmo
Photosynthesis screenshot

Photosynthesis

  • Stem Case

Video Preview

As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching.

Lesson Info
Hurricane Motion screenshot

Hurricane Motion

FREE with no time limit!

Use data from up to three weather stations to predict the motion of a hurricane. The wind speed, wind direction, cloud cover and air pressure are provided for each station using standard weather symbols.

Lesson Info Launch Gizmo
Stoichiometry screenshot

Stoichiometry

FREE with no time limit!

Solve problems in chemistry using dimensional analysis. Select appropriate tiles so that units in the question are converted into units of the answer. Tiles can be flipped, and answers can be calculated once the appropriate unit conversions have been applied.

Lesson Info Launch Gizmo
Ripple Tank screenshot

Ripple Tank

FREE with no time limit!

Study wave motion, diffraction, interference, and refraction in a simulated ripple tank. A wide variety of scenarios can be chosen, including barriers with one or two gaps, multiple wave sources, reflecting barriers, or submerged rocks. The wavelength and strength of waves can be adjusted, as well as the amount of damping in the tank.

Lesson Info Launch Gizmo
Fingerprinting screenshot

Fingerprinting

  • New!

FREE with no time limit!

Collect fingerprints from simulated crime scenes using a camera, fingerprinting powder, and tape. Classify fingerprints into groups and subgroups, then identify minutiae. Match collected prints to the fingerprints of suspects to identify who left prints at the scene of the crime.

Lesson Info Launch Gizmo
Fast Plants<sup>®</sup> 1 - Growth and Genetics screenshot

Fast Plants® 1 - Growth and Genetics

  • New!

FREE with no time limit!

Grow Wisconsin Fast Plants® in a simulated lab environment. Explore the life cycles of these plants and how their growth is influenced by light, water, and crowding. Practice pollinating the plants using bee sticks, then observe the traits of the offspring plants. Use Punnett squares to model the inheritance of genes for stem color and leaf color for these plants.

Lesson Info Launch Gizmo
Fast Plants<sup>®</sup> 2 - Mystery Parent screenshot

Fast Plants® 2 - Mystery Parent

  • New!

FREE with no time limit!

In this follow-up to Fast Plants® 1 - Growth and Genetics, continue to explore inheritance of traits in Wisconsin Fast Plants. Infer the genotype of a "mystery P2 parent" of a set of Fast Plants based on the traits of the P1, F1, and F2 plants. Then create designer Fast Plants by selectively breeding plants with desired traits.

Lesson Info Launch Gizmo
Photosynthesis screenshot

Photosynthesis

  • Stem Case

Video Preview

As a marine biologist students learn about photosynthesis to help scientists in Australia determine why the coral in the Great Barrier Reef is bleaching.

Lesson Info

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© 2025 ExploreLearning. All rights reserved. Gizmo and Gizmos are registered trademarks of ExploreLearning. STEM Cases, Handbooks and the associated Realtime Reporting System are protected by US Patent No. 10,410,534

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