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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 WorkModeling 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 GizmoRock 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 GizmoElevator 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 GizmoFraction 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 GizmoEyes 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 GizmoBuilding 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 GizmoPhases 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 GizmoTriple 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 GizmoElapsed 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 GizmoReaction 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 GizmoCorrelation
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 GizmoIntroduction 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 GizmoMultiplying 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 GizmoArea 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 GizmoHistograms
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 GizmoMuscles 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 GizmoCarbon 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 GizmoBoyle'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 GizmoSound 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 InfoLinear 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 GizmoZap 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 GizmoPoint-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 GizmoPythagorean 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 GizmoGraphs 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 GizmoPhotosynthesis
- 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 InfoHurricane 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 GizmoStoichiometry
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 GizmoRipple 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 GizmoFingerprinting
- 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 GizmoFast 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 GizmoFast 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 GizmoPhotosynthesis
- 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 InfoSorry, 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

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

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

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

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

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

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

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

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

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

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)
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)
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)
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
- 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
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
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
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
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 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
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 to the graph to add inputs and outputs to the relation.
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 find the product.
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 similar animation shows the connection between parallelograms and rectangles.
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 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
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
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
- 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
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
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 behavior, and even near-zero behavior.
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 weather symbols.
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 can be calculated once the appropriate unit conversions have been applied.
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 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
- 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® 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® 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
- 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 InfoFind Your Solution
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