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With over 500 online simulations, virtual labs, and interactive cases for math and science—there’s a Gizmo for just about everybody. Let’s find yours.
Human Homeostasis
5 Minute Preview
Adjust the levels of clothing, perspiration, and exercise to maintain a stable internal temperature as the external temperature changes. Water and blood sugar levels need to be replenished...
Lesson Info Launch GizmoHuman Karyotyping
5 Minute Preview
Sort and pair the images of human chromosomes obtained in a scan. Find differences in the scans of the various patients to find out specific things that can cause disease, as well as...
Lesson Info Launch GizmoHuman Evolution - Skull Analysis
5 Minute Preview
Compare the skulls of a variety of significant human ancestors, or hominids. Use available tools to measure lengths, areas, and angles of important features. Each skull can be viewed from...
Lesson Info Launch GizmoFrog Dissection
- New!
5 Minute Preview
Use a scalpel, forceps, and pins to dissect realistic male and female frogs. Organs can be removed and placed into organ system diagrams. Once the dissections are complete, the frog organ...
Lesson Info Launch GizmoMuscles and Bones
- New!
5 Minute Preview
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 GizmoPollination: Flower to Fruit
5 Minute Preview
Label a diagram that illustrates the anatomy of a flower, and understand the function of each structure. Compare the processes of self pollination and cross pollination, and explore how...
Lesson Info Launch GizmoNitrogen Cycle
- Stem Case
An infant on a farm has blue baby syndrome. As an EPA environmental engineer, students must find the cause of the baby's illness. Using environment data, students learn the importance of...
Lesson InfoRabbit Population by Season
5 Minute Preview
Observe the population of rabbits in an environment over many years. The land available to the rabbits and weather conditions can be adjusted to investigate the effects of urban sprawl and...
Lesson Info Launch GizmoCarbon Cycle
5 Minute Preview
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 GizmoEyes and Vision 1 - Seeing Color
- New!
5 Minute Preview
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 GizmoEyes and Vision 2 - Focusing Light
- New!
5 Minute Preview
Once light enters the eye, it must be focused on the retina. Manipulate the pupil diameter to regulate the amount of light that enters then eye, then change the lens shape to focus light....
Lesson Info Launch GizmoEyes and Vision 3 - Sensing Light
- Free!
- New!
FREE with no time limit!
5 Minute Preview
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 GizmoCell Types
- Free!
FREE with no time limit!
5 Minute Preview
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 GizmoEcosystems
- Stem Case
As a national park ranger, students must restore the ecosystem of a park back to normal. They interact with populations of many organisms including wolves, deer and bees. Students learn the...
Lesson InfoAnimal Group Behavior
- Stem Case
A farmer in Africa is having problems with elephants eating her corn and cotton crops. As a wildlife biologist, students learn about animal group behavior and relationships of elephants and...
Lesson InfoTime Estimation
5 Minute Preview
Try to estimate the passage of time by selecting a time interval, clicking the Start button, and clicking Stop when you think the interval has passed. The estimate and percent error are...
Lesson Info Launch GizmoHearing: Frequency and Volume
5 Minute Preview
Test your hearing range by listening to low-, medium-, and high-frequency sounds. Compare the relative loudness of sounds at each frequency to create an equal-loudness curve. In a quiet...
Lesson Info Launch GizmoDrug Dosage
5 Minute Preview
A drug prescription must be carefully planned to maximize benefit while avoiding an overdose. In this Gizmo, you can give a patient one or more pills and monitor the levels of medication in...
Lesson Info Launch GizmoReal-Time Histogram
5 Minute Preview
Try to click your mouse once every 2 seconds. The time interval between each click is recorded, as well as the error and percent error. Data can be displayed in a table, histogram, or...
Lesson Info Launch GizmoCirculatory System
5 Minute Preview
Trace the path of blood through a beating heart and the network of blood vessels that supplies blood to the body. Take blood samples from different blood vessels to observe blood cells and...
Lesson Info Launch GizmoDiffusion
- Stem Case
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.
Lesson InfoOcean Carbon Equilibrium
- Stem Case
Mussel farmers in the Arctic Ocean have reported problems with their mussels. They have noticed that the mussel shells have eroded and become brittle. Students take on the role of a marine...
Lesson InfoReverse the Field
5 Minute Preview
Measure the time required to write a word when the mouse behaves in a normal fashion and when the direction of motion is reversed from left to right, up to down, or both. Run several...
Lesson Info Launch GizmoSight vs. Sound Reactions
5 Minute Preview
Measure your reaction time by clicking your mouse as quickly as possible when visual or auditory stimuli are presented. The individual response times are recorded, as well as the mean and...
Lesson Info Launch GizmoDye Elimination
5 Minute Preview
When a foreign substance such as a drug is ingested, it often remains in the bloodstream for a long time. This Gizmo models the elimination of substances from the bloodstream using water...
Lesson Info Launch GizmoSound Beats and Sine Waves
5 Minute Preview
Listen to and see interference patterns produced by sound waves with similar frequencies. Test your ability to distinguish and match sounds as musicians do when they tune their instruments....
Lesson Info Launch GizmoMeasuring Motion
5 Minute Preview
Go on an African safari and observe a variety of animals walking and running across the savanna. Videotape the animals, and then play back the videotape to estimate animal speeds. Which...
Lesson Info Launch GizmoRiver Detective: The Case of the Missing Shad
- Free!
- Stem Case
FREE with no time limit!
Video PreviewAn 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 InfoDigestive System
5 Minute Preview
Digestion is a complex process, involving a wide variety of organs and chemicals that work together to break down food, absorb nutrients, and eliminate wastes. But have you ever wondered...
Lesson Info Launch GizmoEmbryo Development
- New!
5 Minute Preview
Explore how a fertilized cell develops into an embryo, a fetus, and eventually an adult organism. Compare embryo development in different vertebrate species and try to guess which embryo...
Lesson Info Launch GizmoProtein Synthesis
- Free!
- Stem Case
FREE with no time limit!
Video PreviewAs a pediatrician, students learn about genes and protein synthesis to try to help a baby girl named Lucy who has an immunodeficiency disease.
Lesson InfoEyes and Vision 3 - Sensing Light
- Free!
- New!
FREE with no time limit!
5 Minute Preview
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 GizmoCell Types
- Free!
FREE with no time limit!
5 Minute Preview
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 GizmoProtein Synthesis
- Free!
- Stem Case
FREE with no time limit!
Video PreviewAs a pediatrician, students learn about genes and protein synthesis to try to help a baby girl named Lucy who has an immunodeficiency disease.
Lesson InfoRiver Detective: The Case of the Missing Shad
- Free!
- Stem Case
FREE with no time limit!
Video PreviewAn 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 InfoNitrogen Cycle
- Stem Case
Video Preview
An infant on a farm has blue baby syndrome. As an EPA environmental engineer, students must find the cause of the baby's illness. Using environment data, students learn the importance of...
Lesson InfoEcosystems
- Stem Case
Video Preview
As a national park ranger, students must restore the ecosystem of a park back to normal. They interact with populations of many organisms including wolves, deer and bees. Students learn the...
Lesson InfoAnimal Group Behavior
- Stem Case
Video Preview
A farmer in Africa is having problems with elephants eating her corn and cotton crops. As a wildlife biologist, students learn about animal group behavior and relationships of elephants and...
Lesson InfoDiffusion
- Stem Case
Video Preview
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.
Lesson InfoOcean Carbon Equilibrium
- Stem Case
Video Preview
Mussel farmers in the Arctic Ocean have reported problems with their mussels. They have noticed that the mussel shells have eroded and become brittle. Students take on the role of a marine...
Lesson InfoRiver Detective: The Case of the Missing Shad
- Free!
- Stem Case
FREE with no time limit!
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 InfoProtein Synthesis
- Free!
- Stem Case
FREE with no time limit!
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 InfoHuman Homeostasis
5 Minute Preview
Adjust the levels of clothing, perspiration, and exercise to maintain a stable internal temperature as the external temperature changes. Water and blood sugar levels need to be replenished regularly, and fatigue occurs with heavy exercise. Severe hypothermia, heat stroke, or dehydration can result if internal stability is not maintained.
Lesson Info Launch GizmoHuman Karyotyping
5 Minute Preview
Sort and pair the images of human chromosomes obtained in a scan. Find differences in the scans of the various patients to find out specific things that can cause disease, as well as determining the sex of the person.
Lesson Info Launch GizmoHuman Evolution - Skull Analysis
5 Minute Preview
Compare the skulls of a variety of significant human ancestors, or hominids. Use available tools to measure lengths, areas, and angles of important features. Each skull can be viewed from the front, side, or from below. Additional information regarding the age, location, and discoverer of each skull can be displayed.
Lesson Info Launch GizmoFrog Dissection
- New!
5 Minute Preview
Use a scalpel, forceps, and pins to dissect realistic male and female frogs. Organs can be removed and placed into organ system diagrams. Once the dissections are complete, the frog organ systems can be compared. Zooming, rotating, and panning tools are available to examine the frog from any angle.
Lesson Info Launch GizmoMuscles and Bones
- New!
5 Minute Preview
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 GizmoPollination: Flower to Fruit
5 Minute Preview
Label a diagram that illustrates the anatomy of a flower, and understand the function of each structure. Compare the processes of self pollination and cross pollination, and explore how fertilization takes place in a flowering plant.
Lesson Info Launch GizmoNitrogen Cycle
- Stem Case
Video Preview
An infant on a farm has blue baby syndrome. As an EPA environmental engineer, students must find the cause of the baby's illness. Using environment data, students learn the importance of the nitrogen cycle and how human factors can impact nature.
Lesson InfoRabbit Population by Season
5 Minute Preview
Observe the population of rabbits in an environment over many years. The land available to the rabbits and weather conditions can be adjusted to investigate the effects of urban sprawl and unusual weather on wildlife populations.
Lesson Info Launch GizmoCarbon Cycle
5 Minute Preview
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 GizmoEyes and Vision 1 - Seeing Color
- New!
5 Minute Preview
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 GizmoEyes and Vision 2 - Focusing Light
- New!
5 Minute Preview
Once light enters the eye, it must be focused on the retina. Manipulate the pupil diameter to regulate the amount of light that enters then eye, then change the lens shape to focus light. Determine the changes in lens shape needed to maintain focus as the object distance changes. This is a followup to the Eyes and Vision 1 - Seeing Colors lesson.
Lesson Info Launch GizmoEyes and Vision 3 - Sensing Light
- Free!
- New!
FREE with no time limit!
5 Minute Preview
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 GizmoCell Types
- Free!
FREE with no time limit!
5 Minute Preview
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 GizmoEcosystems
- Stem Case
Video Preview
As a national park ranger, students must restore the ecosystem of a park back to normal. They interact with populations of many organisms including wolves, deer and bees. Students learn the importance of food chains and webs, and how human factors can impact the health of an environment.
Lesson InfoAnimal Group Behavior
- Stem Case
Video Preview
A farmer in Africa is having problems with elephants eating her corn and cotton crops. As a wildlife biologist, students learn about animal group behavior and relationships of elephants and humans with bees. Students collect data from the farm and elephants to hypothesize and test solutions that will protect the crops without hurting the elephants.
Lesson InfoTime Estimation
5 Minute Preview
Try to estimate the passage of time by selecting a time interval, clicking the Start button, and clicking Stop when you think the interval has passed. The estimate and percent error are recorded. Compare different techniques for estimating time, as well as the average error for long time intervals versus shorter intervals.
Lesson Info Launch GizmoHearing: Frequency and Volume
5 Minute Preview
Test your hearing range by listening to low-, medium-, and high-frequency sounds. Compare the relative loudness of sounds at each frequency to create an equal-loudness curve. In a quiet room, measure your threshold of audibility for each frequency, and compare your results to others. The volume of each sound can be adjusted.
Lesson Info Launch GizmoDrug Dosage
5 Minute Preview
A drug prescription must be carefully planned to maximize benefit while avoiding an overdose. In this Gizmo, you can give a patient one or more pills and monitor the levels of medication in the body through time. Based on the reaction of the patient, determine the ideal levels of medication. Create a dosage schedule so these levels are maintained through time. Four types of pills, each with a different release pattern and target organ, are available for use.
Lesson Info Launch GizmoReal-Time Histogram
5 Minute Preview
Try to click your mouse once every 2 seconds. The time interval between each click is recorded, as well as the error and percent error. Data can be displayed in a table, histogram, or scatter plot. Observe and measure the characteristics of the resulting distribution when large amounts of data are collected.
Lesson Info Launch GizmoCirculatory System
5 Minute Preview
Trace the path of blood through a beating heart and the network of blood vessels that supplies blood to the body. Take blood samples from different blood vessels to observe blood cells and measure the levels of oxygen, carbon dioxide, sugar, and urea.
Lesson Info Launch GizmoDiffusion
- Stem Case
Video Preview
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.
Lesson InfoOcean Carbon Equilibrium
- Stem Case
Video Preview
Mussel farmers in the Arctic Ocean have reported problems with their mussels. They have noticed that the mussel shells have eroded and become brittle. Students take on the role of a marine chemist to analyze the changes to ocean carbon chemistry and equilibrium to determine the cause of the mussel shell erosion.
Lesson InfoReverse the Field
5 Minute Preview
Measure the time required to write a word when the mouse behaves in a normal fashion and when the direction of motion is reversed from left to right, up to down, or both. Run several experiments in each mode to see if your brain and muscles are able to adapt to the new direction of motion. Determine which type of inversion is easiest to adjust to and whether you can train yourself to function normally when the inversion is present.
Lesson Info Launch GizmoSight vs. Sound Reactions
5 Minute Preview
Measure your reaction time by clicking your mouse as quickly as possible when visual or auditory stimuli are presented. The individual response times are recorded, as well as the mean and standard deviation for each test. A histogram of data shows overall trends in sight and sound response times. The type of test as well as the symbols and sounds used are chosen by the user.
Lesson Info Launch GizmoDye Elimination
5 Minute Preview
When a foreign substance such as a drug is ingested, it often remains in the bloodstream for a long time. This Gizmo models the elimination of substances from the bloodstream using water and dye. Add dye to a container of water, and then add beakers of pure water while removing beakers of dyed water. The amount of dye remaining is recorded after each cycle. The volumes of all containers can be adjusted, as well as the amount of dye used. This provides a good example of exponential decay.
Lesson Info Launch GizmoSound Beats and Sine Waves
5 Minute Preview
Listen to and see interference patterns produced by sound waves with similar frequencies. Test your ability to distinguish and match sounds as musicians do when they tune their instruments. Calculate the number of "sound beats" you will hear based on the frequency of each sound. [Note: Headphones are recommended for this Gizmo.]
Lesson Info Launch GizmoMeasuring Motion
5 Minute Preview
Go on an African safari and observe a variety of animals walking and running across the savanna. Videotape the animals, and then play back the videotape to estimate animal speeds. Which animals run fastest?
Lesson Info Launch GizmoRiver Detective: The Case of the Missing Shad
- Free!
- Stem Case
FREE with no time limit!
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 InfoDigestive System
5 Minute Preview
Digestion is a complex process, involving a wide variety of organs and chemicals that work together to break down food, absorb nutrients, and eliminate wastes. But have you ever wondered what would happen if some of those organs were eliminated, or if the sequence was changed? Can the digestive system be improved? Find out by designing your own digestive system with the Digestive System Gizmo.
Lesson Info Launch GizmoEmbryo Development
- New!
5 Minute Preview
Explore how a fertilized cell develops into an embryo, a fetus, and eventually an adult organism. Compare embryo development in different vertebrate species and try to guess which embryo belongs to each species. Use dyes to trace the differentiation of cells during early embryo development, from the zygote to the neurula.
Lesson Info Launch GizmoProtein Synthesis
- Free!
- Stem Case
FREE with no time limit!
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 InfoEyes and Vision 3 - Sensing Light
- Free!
- New!
FREE with no time limit!
5 Minute Preview
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 GizmoCell Types
- Free!
FREE with no time limit!
5 Minute Preview
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 GizmoProtein Synthesis
- Free!
- Stem Case
FREE with no time limit!
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 InfoRiver Detective: The Case of the Missing Shad
- Free!
- Stem Case
FREE with no time limit!
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 InfoNitrogen Cycle
- Stem Case
Video Preview
An infant on a farm has blue baby syndrome. As an EPA environmental engineer, students must find the cause of the baby's illness. Using environment data, students learn the importance of the nitrogen cycle and how human factors can impact nature.
Lesson InfoEcosystems
- Stem Case
Video Preview
As a national park ranger, students must restore the ecosystem of a park back to normal. They interact with populations of many organisms including wolves, deer and bees. Students learn the importance of food chains and webs, and how human factors can impact the health of an environment.
Lesson InfoAnimal Group Behavior
- Stem Case
Video Preview
A farmer in Africa is having problems with elephants eating her corn and cotton crops. As a wildlife biologist, students learn about animal group behavior and relationships of elephants and humans with bees. Students collect data from the farm and elephants to hypothesize and test solutions that will protect the crops without hurting the elephants.
Lesson InfoDiffusion
- Stem Case
Video Preview
As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.
Lesson InfoOcean Carbon Equilibrium
- Stem Case
Video Preview
Mussel farmers in the Arctic Ocean have reported problems with their mussels. They have noticed that the mussel shells have eroded and become brittle. Students take on the role of a marine chemist to analyze the changes to ocean carbon chemistry and equilibrium to determine the cause of the mussel shell erosion.
Lesson InfoRiver Detective: The Case of the Missing Shad
- Free!
- Stem Case
FREE with no time limit!
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 InfoProtein Synthesis
- Free!
- Stem Case
FREE with no time limit!
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 InfoFind Your Solution
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