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# FREE Gizmos

## Get access to a rotating collection of free Gizmos chosen from our library of over 550 math and science labs and simulations. Sign up today to start teaching with these online STEM tools!

See How FREE Gizmos WorkMascot Election (Pictographs and Bar Graphs)

FREE *with no time limit!*

A brand new school is opening and it is time to elect the school mascot! Students can choose the Eagle, Lion, Bear, or Wolf. Voting results can be displayed in a table, tally chart,...

Lesson Info Launch GizmoNumber Line Frog Hop (Addition and Subtraction)

FREE *with no time limit!*

Live a frog's life as you hop along a number line in search of flies. Learn how addition and subtraction can be represented as movement along a number line. Fred the frog may even help you...

Lesson Info Launch GizmoHoliday Snowflake Designer

FREE *with no time limit!*

Fold paper and cut in a certain way to make symmetrical snowflakes with six sides (similar to what can be found in nature) or with eight sides (an easier folding method). This simulation...

Lesson Info Launch GizmoFunction Machines 1 (Functions and Tables)

FREE *with no time limit!*

Drop a number into a function machine, and see what number comes out! You can use one of the six pre-set function machines, or program your own function rule into one of the blank machines....

Lesson Info Launch GizmoSolar System

FREE *with no time limit!*

Explore our solar system and learn the characteristics of each planet. Compare the sizes of planets and their distances from the Sun. Observe the speeds of planetary orbits and measure how...

Lesson Info Launch GizmoEyes and Vision 3 - Sensing Light

- New!

FREE *with no time limit!*

Observe how photoreceptors on the retina are stimulated by different colors of light. Determine that cone cells are stimulated by specific colors of light and enable us to see color, while...

Lesson Info Launch GizmoMagnetism

FREE *with no time limit!*

Drag bar magnets and a variety of other objects onto a piece of paper. Click Play to release the objects to see if they are attracted together, repelled apart, or unaffected. You can also...

Lesson Info Launch GizmoPercents and Proportions

FREE *with no time limit!*

Find a part from the percent and whole, a percent from the part and whole, or a whole from the part and percent using a graphic model.

Lesson Info Launch GizmoTrends in Scatter Plots

FREE *with no time limit!*

Examine the scatter plot for a random data set with negative or positive correlation. Vary the correlation and explore how correlation is reflected in the scatter plot and the trend line.

Lesson Info Launch GizmoLucky Duck (Expected Value)

- New!

FREE *with no time limit!*

Pick a duck, win a prize! Help Arnie the carnie design his game so that he makes money (or at least breaks even). How many ducks of each type should there be? What are the prizes worth? How...

Lesson Info Launch GizmoDistance-Time Graphs

FREE *with no time limit!*

Create a graph of a runner's position versus time and watch the runner complete a 40-yard dash based on the graph you made. Notice the connection between the slope of the line and the speed...

Lesson Info Launch GizmoEarthquake-Proof Homes

- New!

FREE *with no time limit!*

Design a house to withstand an earthquake and protect the people living inside. Select a location in San Francisco, then choose the design and materials for a foundation, frame, walls, and...

Lesson Info Launch GizmoCell Types

FREE *with no time limit!*

Explore a wide variety of cells, from bacteria to human neurons, using a compound light microscope. Select a sample to study, then focus on the sample using the coarse and fine focus...

Lesson Info Launch GizmoCladograms

- New!

FREE *with no time limit!*

Based on the similarities and differences between different organisms, create branching diagrams called cladograms to show how they are related. Use both morphological data (physical...

Lesson Info Launch GizmoTrebuchet

FREE *with no time limit!*

Design your own trebuchet to fling a projectile at a castle wall. All of the dimensions of the trebuchet can be adjusted, as well as the masses of the counterweight and payload. Select a...

Lesson Info Launch GizmoHeat Absorption

FREE *with no time limit!*

Shine a powerful flashlight on a variety of materials, and measure how quickly each material heats up. See how the light angle, light color, type of material, and material color affect...

Lesson Info Launch GizmoLinear Functions

FREE *with no time limit!*

Determine if a relation is a function from the mapping diagram, ordered pairs, or graph. Use the graph to determine if it is linear.

Lesson Info Launch GizmoSystems of Linear Inequalities (Slope-intercept form)

FREE *with no time limit!*

Compare a system of linear inequalities to its graph. Vary the coefficients and inequality symbols in the system and explore how the boundary lines, shaded regions, and the intersection of...

Lesson Info Launch GizmoSurface and Lateral Areas of Pyramids and Cones

FREE *with no time limit!*

Vary the dimensions of a pyramid or cone and investigate how the surface area changes. Use the dynamic net of the solid to compute the lateral area and the surface area of the solid.

Lesson Info Launch GizmoQuadratics in Factored Form

FREE *with no time limit!*

Investigate the factors of a quadratic through its graph and through its equation. Vary the roots of the quadratic and examine how the graph and the equation change in response.

Lesson Info Launch GizmoRational Functions

FREE *with no time limit!*

Compare the graph of a rational function to its equation. Vary the terms of the equation and explore how the graph is translated and stretched as a result. Examine the domain on a number...

Lesson Info Launch GizmoRadians

- New!

FREE *with no time limit!*

As factory belt operator, your job is to move boxes just the right distance on the belt, so they can be stamped for delivery. Your only controls are the radius and rotation of the belt’s...

Lesson Info Launch GizmoPolling: City

FREE *with no time limit!*

Poll residents in a large city to determine their response to a yes-or-no question. Estimate the actual percentage of yes votes in the whole city. Examine the results of many polls to help...

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 GizmoCrumple Zones

- New!

FREE *with no time limit!*

Design a car to protect a test dummy in a collision. Adjust the length and stiffness of the crumple zone and the rigidity of the safety cell to determine how the car will deform during the...

Lesson Info Launch GizmoProtein Synthesis

- Stem Case

*Video Preview*

As a pediatrician, students learn about genes and protein synthesis to try to help a baby girl named Lucy who has an immunodeficiency disease.

Lesson InfoWater Contamination

- Stem Case

*Video Preview*

There has been an outbreak of legionnaires’ disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the role...

Lesson InfoElectron Configuration

FREE *with no time limit!*

Create the electron configuration of any element by filling electron orbitals. Determine the relationship between electron configuration and atomic radius. Discover trends in atomic radii...

Lesson Info Launch GizmoNuclear Reactions

FREE *with no time limit!*

Explore examples of nuclear fusion and fission reactions. Follow the steps of the proton-proton chain, CNO cycle, and fission of uranium-235. Write balanced nuclear equations for each step,...

Lesson Info Launch GizmoProtein Synthesis

- Stem Case

*Video Preview*

As a pediatrician, students learn about genes and protein synthesis to try to help a baby girl named Lucy who has an immunodeficiency disease.

Lesson InfoWater Contamination

- Stem Case

*Video Preview*

There has been an outbreak of legionnaires’ disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the role...

Lesson InfoDisease Spread

- Updated!

FREE *with no time limit!*

Observe the spread of disease through a group of people. The methods of transmission can be chosen and include person-to-person, airborne, and foodborne as well as any combination thereof....

Lesson Info Launch GizmoRiver Detective: The Case of the Missing Shad

- Stem Case

*Video Preview*

An important fish species, the American Shad, has disappeared from the James River in Virginia. Students take on the role of a junior River Watch member to investigate the shad population’s...

Lesson InfoPond Ecosystem

FREE *with no time limit!*

Measure the temperature and oxygen content of a pond over the course of a day. Then go fishing to see what types of fish live in the pond. Many different ponds can be investigated to...

Lesson Info Launch GizmoProgrammable Rover

- New!

FREE *with no time limit!*

In this introduction to coding, program a rover to explore the surface of Mars. Start by using tiles to create simple programs involving moving forward or backward, turns, jumps, loops, and...

Lesson Info Launch GizmoSorry, 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.

Mascot Election (Pictographs and Bar Graphs)

FREE *with no time limit!*

A brand new school is opening and it is time to elect the school mascot! Students can choose the Eagle, Lion, Bear, or Wolf. Voting results can be displayed in a table, tally chart, pictograph, bar graph, circle graph, or dot plot. You can change student votes by selecting a group of students and clicking a mascot.

Lesson Info Launch GizmoNumber Line Frog Hop (Addition and Subtraction)

FREE *with no time limit!*

Live a frog's life as you hop along a number line in search of flies. Learn how addition and subtraction can be represented as movement along a number line. Fred the frog may even help you get better at adding and subtracting two-digit numbers in your head by decomposing them into tens and ones.

Lesson Info Launch GizmoHoliday Snowflake Designer

FREE *with no time limit!*

Fold paper and cut in a certain way to make symmetrical snowflakes with six sides (similar to what can be found in nature) or with eight sides (an easier folding method). This simulation allows you to cut virtual paper on the computer screen with round dot or square dot "scissors" of various sizes before using physical paper.

Lesson Info Launch GizmoFunction Machines 1 (Functions and Tables)

FREE *with no time limit!*

Drop a number into a function machine, and see what number comes out! You can use one of the six pre-set function machines, or program your own function rule into one of the blank machines. Stack up to three function machines together. Input and output can be recorded in a table and on a graph.

Lesson Info Launch GizmoSolar System

FREE *with no time limit!*

Explore our solar system and learn the characteristics of each planet. Compare the sizes of planets and their distances from the Sun. Observe the speeds of planetary orbits and measure how long each planet takes to go around the Sun.

Lesson Info Launch GizmoEyes and Vision 3 - Sensing Light

- New!

FREE *with no time limit!*

Observe how photoreceptors on the retina are stimulated by different colors of light. Determine that cone cells are stimulated by specific colors of light and enable us to see color, while rod cells are stimulated by various colors and do not contribute to color vision. Experiment by varying the percentage of rod and cone cells in normal and dim light to see how rod cells help with night vision.

Lesson Info Launch GizmoMagnetism

FREE *with no time limit!*

Drag bar magnets and a variety of other objects onto a piece of paper. Click Play to release the objects to see if they are attracted together, repelled apart, or unaffected. You can also sprinkle iron filings over the magnets and other objects to view the magnetic field lines that are produced.

Lesson Info Launch GizmoPercents and Proportions

FREE *with no time limit!*

Find a part from the percent and whole, a percent from the part and whole, or a whole from the part and percent using a graphic model.

Lesson Info Launch GizmoTrends in Scatter Plots

FREE *with no time limit!*

Examine the scatter plot for a random data set with negative or positive correlation. Vary the correlation and explore how correlation is reflected in the scatter plot and the trend line.

Lesson Info Launch GizmoLucky Duck (Expected Value)

- New!

FREE *with no time limit!*

Pick a duck, win a prize! Help Arnie the carnie design his game so that he makes money (or at least breaks even). How many ducks of each type should there be? What are the prizes worth? How much should he charge to play? Lucky Duck is a fun way to learn about probabilities and expected value.

Lesson Info Launch GizmoDistance-Time Graphs

FREE *with no time limit!*

Create a graph of a runner's position versus time and watch the runner complete a 40-yard dash based on the graph you made. Notice the connection between the slope of the line and the speed of the runner. What will the runner do if the slope of the line is zero? What if the slope is negative? Add a second runner (a second graph) and connect real-world meaning to the intersection of two graphs.

Lesson Info Launch GizmoEarthquake-Proof Homes

- New!

FREE *with no time limit!*

Design a house to withstand an earthquake and protect the people living inside. Select a location in San Francisco, then choose the design and materials for a foundation, frame, walls, and roof. Decide which extras to add to your home design. Test each house in an earthquake and assess the damages. Try to arrive at a house design that results in the least damage.

Lesson Info Launch GizmoCell Types

FREE *with no time limit!*

Explore a wide variety of cells, from bacteria to human neurons, using a compound light microscope. Select a sample to study, then focus on the sample using the coarse and fine focus controls of the microscope. Compare the structures found in different cells, then perform tests to see if the sample is alive.

Lesson Info Launch GizmoCladograms

- New!

FREE *with no time limit!*

Based on the similarities and differences between different organisms, create branching diagrams called cladograms to show how they are related. Use both morphological data (physical traits) and molecular data to create the simplest and most likely cladograms. Five different sets of organisms are available.

Lesson Info Launch GizmoTrebuchet

FREE *with no time limit!*

Design your own trebuchet to fling a projectile at a castle wall. All of the dimensions of the trebuchet can be adjusted, as well as the masses of the counterweight and payload. Select a target on the Launch tab, or just see how far your projectile will go.

Lesson Info Launch GizmoHeat Absorption

FREE *with no time limit!*

Shine a powerful flashlight on a variety of materials, and measure how quickly each material heats up. See how the light angle, light color, type of material, and material color affect heating. A glass cover can be added to simulate a greenhouse.

Lesson Info Launch GizmoLinear Functions

FREE *with no time limit!*

Determine if a relation is a function from the mapping diagram, ordered pairs, or graph. Use the graph to determine if it is linear.

Lesson Info Launch GizmoSystems of Linear Inequalities (Slope-intercept form)

FREE *with no time limit!*

Compare a system of linear inequalities to its graph. Vary the coefficients and inequality symbols in the system and explore how the boundary lines, shaded regions, and the intersection of the shaded regions change in response.

Lesson Info Launch GizmoSurface and Lateral Areas of Pyramids and Cones

FREE *with no time limit!*

Vary the dimensions of a pyramid or cone and investigate how the surface area changes. Use the dynamic net of the solid to compute the lateral area and the surface area of the solid.

Lesson Info Launch GizmoQuadratics in Factored Form

FREE *with no time limit!*

Investigate the factors of a quadratic through its graph and through its equation. Vary the roots of the quadratic and examine how the graph and the equation change in response.

Lesson Info Launch GizmoRational Functions

FREE *with no time limit!*

Compare the graph of a rational function to its equation. Vary the terms of the equation and explore how the graph is translated and stretched as a result. Examine the domain on a number line and compare it to the graph of the equation.

Lesson Info Launch GizmoRadians

- New!

FREE *with no time limit!*

As factory belt operator, your job is to move boxes just the right distance on the belt, so they can be stamped for delivery. Your only controls are the radius and rotation of the belt’s wheel. How do you set these to get the distance right? See how this relates to arc length, and discover how radians help make this task easier.

Lesson Info Launch GizmoPolling: City

FREE *with no time limit!*

Poll residents in a large city to determine their response to a yes-or-no question. Estimate the actual percentage of yes votes in the whole city. Examine the results of many polls to help assess how reliable the results from a single poll are. See how the normal curve approximates a binomial distribution for large enough polls.

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 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.

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.

Crumple Zones

- New!

FREE *with no time limit!*

Design a car to protect a test dummy in a collision. Adjust the length and stiffness of the crumple zone and the rigidity of the safety cell to determine how the car will deform during the crash. Add seat belts and/or airbags to prevent the dummy from hitting the steering wheel. Three different body types (sedan, SUV, and subcompact) are available and a wide range of crash speeds can be used.

Lesson Info Launch GizmoProtein Synthesis

- Stem Case

*Video Preview*

As a pediatrician, students learn about genes and protein synthesis to try to help a baby girl named Lucy who has an immunodeficiency disease.

Lesson InfoWater Contamination

- Stem Case

*Video Preview*

There has been an outbreak of legionnaires’ disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the role of a civil engineer to investigate how the water treatment plant has failed to get rid of all the contaminants in the water and design a new method.

Lesson InfoElectron Configuration

FREE *with no time limit!*

Create the electron configuration of any element by filling electron orbitals. Determine the relationship between electron configuration and atomic radius. Discover trends in atomic radii across periods and down families/groups of the periodic table.

Lesson Info Launch GizmoNuclear Reactions

FREE *with no time limit!*

Explore examples of nuclear fusion and fission reactions. Follow the steps of the proton-proton chain, CNO cycle, and fission of uranium-235. Write balanced nuclear equations for each step, and compare the energy produced in each process.

Lesson Info Launch GizmoProtein Synthesis

- Stem Case

*Video Preview*

Water Contamination

- Stem Case

*Video Preview*

There has been an outbreak of legionnaires’ disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the role of a civil engineer to investigate how the water treatment plant has failed to get rid of all the contaminants in the water and design a new method.

Lesson InfoDisease Spread

- Updated!

FREE *with no time limit!*

Observe the spread of disease through a group of people. The methods of transmission can be chosen and include person-to-person, airborne, and foodborne as well as any combination thereof. The probability of each form of transmission and number of people in the group can also be adjusted.

Lesson Info Launch GizmoRiver Detective: The Case of the Missing Shad

- Stem Case

*Video Preview*

An important fish species, the American Shad, has disappeared from the James River in Virginia. Students take on the role of a junior River Watch member to investigate the shad population’s decline. They collect and analyze data about biotic and abiotic factors related to water quality and fish survival. Then students use this data to construct a model of cause-and-effect relationships in the James River watershed and design a solution to bring back this iconic fish.

Lesson InfoPond Ecosystem

FREE *with no time limit!*

Measure the temperature and oxygen content of a pond over the course of a day. Then go fishing to see what types of fish live in the pond. Many different ponds can be investigated to determine the influence of time, temperature, and farms on oxygen levels.

Lesson Info Launch GizmoProgrammable Rover

- New!

FREE *with no time limit!*

In this introduction to coding, program a rover to explore the surface of Mars. Start by using tiles to create simple programs involving moving forward or backward, turns, jumps, loops, and picking up rock samples. Then use text instructions to optimize your code. Use your skills to program the rover to complete six challenging missions on Mars.

Lesson Info Launch GizmoFind Your Solution

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