PhET Interactive Simulations
This app has not yet been evaluated against our instructional invariants. The analysis below is based on independent research.
The Bottom Line
Yes. PhET Interactive Simulations effectively teaches complex math and science concepts through inquiry-based learning. By allowing students to manipulate variables in real-time, the platform builds deep conceptual models rather than relying on rote memorization. However, because it lacks built-in instruction, it requires external guidance from a teacher or parent to maximize learning outcomes.
Pros
- Provides immediate visual feedback when variables change to support accurate conceptual understanding.
- Uses inquiry-based learning mechanics that allow students to test hypotheses and observe cause-and-effect safely.
- Strips away unnecessary visual clutter to focus cognitive load strictly on the target learning objectives.
- Offers extensive accessibility features including keyboard navigation and audio description for diverse learners.
Cons
- Lacks direct instruction or built-in tutorials to guide novice learners through new concepts.
- Offers no automated assessment or mastery tracking to verify if a student actually retained the material.
- Requires high self-regulation, as students can easily play with the simulation without engaging in deliberate practice.
Does PhET Interactive Simulations Actually Teach?
PhET Interactive Simulations is a highly effective tool for learning math and science, provided your child uses it alongside formal instruction. The platform functions as a virtual laboratory rather than a standalone curriculum. Your child will not find video lectures, multiple-choice quizzes, or a personalized learning path here. Instead, they get an open sandbox designed around inquiry-based learning. When your child struggles to visualize how electrons move in a circuit or how gravity affects planetary orbits, PhET provides an interactive model where they can change variables and instantly see the results. This immediate feedback loop is excellent for correcting misconceptions. However, because there is no built-in guidance, a student acting alone may just click around aimlessly. To get the most out of PhET, you must provide specific goals or use the platform to answer concrete questions from your child's homework. The website version is completely free and requires no login, making it incredibly accessible for immediate homework help. Note that while The Learning Standard has not yet formally evaluated PhET against our full rubric, the underlying design strongly aligns with established cognitive science principles regarding multimedia learning.
How Does PhET Interactive Simulations Help Students Learn?
PhET uses an inquiry-based learning approach where students manipulate interactive virtual models to discover scientific and mathematical principles. When your child opens a simulation, they are presented with a simplified visual representation of a concept, such as a skateboarder on a ramp to learn about energy conservation. They can adjust variables like mass, friction, or gravity using sliders and instantly observe how these changes impact the entire system. This relies heavily on the modality principle of multimedia learning, presenting information visually and dynamically to reduce cognitive load. The mechanics encourage active hypothesis testing. A student might ask what happens if they double the weight, and they can immediately test that exact idea. Many simulations include optional visual aids, such as energy bar graphs or force vectors, which help bridge the gap between abstract math and concrete physics. There is no linear progression or forced sequence, meaning your child controls the exact pace and direction of the exploration.
Where Does PhET Interactive Simulations Excel and Fall Short?
PhET's biggest strength is its ability to make invisible abstract concepts visible, while its biggest weakness is the complete lack of built-in instructional scaffolding. Strengths: The platform excels at reducing cognitive load by eliminating irrelevant details from complex scientific phenomena. By isolating specific variables, PhET directs the learner's attention exactly where it needs to be. The simulations also provide immediate, dynamic feedback. When a student changes the concentration of a virtual solution, the color changes instantly, cementing the cause-and-effect relationship in their mental model. This aligns perfectly with the principles of active learning. Weaknesses: Because PhET operates purely as an exploratory sandbox, it relies entirely on the student's intrinsic motivation and prior knowledge. There is no retrieval practice built into the system to cement long-term memory. If a student misunderstands a concept, the simulation itself will not correct them or provide a worked example to explain the error. Without external guidance from a teacher or parent setting specific parameters for the exploration, students frequently engage in unstructured play rather than rigorous scientific inquiry.
Is PhET Interactive Simulations Right for Your Child?
PhET is best for middle school, high school, and college students who need visual, interactive models to understand abstract math and science concepts. While there are a few elementary-level simulations, the platform shines in complex subjects like physics, chemistry, and calculus. It is an ideal supplementary tool for visual learners who struggle with textbook explanations. Parents and educators should use it specifically for homework help or laboratory replacements when physical equipment is unavailable. It is not designed for students who need a complete, self-paced curriculum.
Frequently Asked Questions About PhET Interactive Simulations
Is PhET Interactive Simulations free?
Yes, the web-based version of PhET Interactive Simulations is entirely free to use. There are no paywalls, subscriptions, or login requirements to access the simulations through a browser. The developer does offer native apps for iOS and Android that allow for offline use, which cost $0.99. The revenues from these app sales help fund the ongoing development of the free web platform.
What does PhET Interactive Simulations teach?
PhET teaches core concepts in physics, chemistry, math, earth science, and biology. The simulations focus heavily on conceptual understanding rather than procedural calculation. For example, instead of just memorizing the formula for Ohm's Law, your child will manipulate virtual batteries and resistors to see how voltage and current relate in real-time. It covers topics ranging from basic fractions to quantum mechanics.
Is PhET Interactive Simulations good for elementary students?
Partially. While PhET offers some excellent simulations for elementary math and basic science, the vast majority of its content targets middle school, high school, and college levels. Younger children often lack the self-regulation required to benefit from open-ended inquiry learning without heavy, direct supervision from an adult setting specific tasks.
Is PhET Interactive Simulations safe for kids?
Yes, PhET is completely safe for children. The platform does not require an account, does not collect personal student data, and features zero advertisements or social features. Students cannot interact with strangers or access external links from within the simulation environment. It operates purely as an educational utility.
PhET Interactive Simulations vs. Khan Academy: Which is better?
Neither is universally better; they serve entirely different purposes. Khan Academy provides direct instruction through video lectures and spaced retrieval practice through quizzes, making it a comprehensive curriculum tool. PhET provides virtual laboratories for conceptual exploration but lacks direct instruction and assessment. The most effective approach combines both: using Khan Academy to learn the procedural steps and PhET to visualize the underlying concepts.
Has The Learning Standard evaluated PhET Interactive Simulations?
No, PhET Interactive Simulations is currently pending evaluation by The Learning Standard. We have not yet run it through our formal rubric. When evaluated, our team will rigorously analyze its efficacy based on our published methodology, focusing specifically on how well its inquiry-based approach drives measurable conceptual mastery compared to traditional instruction.
Data Transparency
22 of 35 checks passed
Evaluated April 2026
View privacy policy →View all 35 checks
Parent Access4/8
Does the policy mention parents specifically?
“Requests for account deletions by other authorized parties, such as school administrators or parents”
Can parents view their child's data?
“The policy does not explicitly state that parents can view their child's data.”
Can parents modify their child's data?
“The policy does not explicitly state that parents can modify their child's data.”
Can parents delete their child's account?
“Requests for account deletions by other authorized parties, such as school administrators or parents”
Is there a dedicated Children's Privacy section?
“Collection of Data from Children”
Does it reference COPPA compliance?
“we maintain our compliance with COPPA since children under 13 are ineligible to create a user account”
Does it reference FERPA compliance?
“The policy does not mention FERPA.”
Is parental consent required for child accounts?
“Although we do not provide notice to parents or guardians, or provide parents or guardians with methods to provide parental consent”
Data Portability1/5
Can users access their personal data?
“Users have the ability to view, modify, or delete their own information.”
Can users download/export their data?
“The policy does not mention users downloading or exporting their data.”
Is there a self-service data access tool?
“While users can view information, no specific self-service data access tool is mentioned.”
Is a specific data format mentioned for export?
“No data format for export is mentioned.”
Is there an API for data access?
“There is no mention of an API for data access.”
Data Minimization5/6
Is data collection itemized?
“limited non-personally identifiable information is collected when a simulation is run (simulation name, simulation version, simulation language, timestamp...)”
Can the app be used without a real name?
“Resources intended solely for student use are all accessible without the need for login or registration.”
Can the app be used without an email?
“Resources intended solely for student use are all accessible without the need for login or registration.”
Does it state collection is limited to what is necessary?
“we attempt to only collect the minimum information necessary to best serve our mission”
Is IP address anonymized or truncated?
“Our Google Analytics is configured for “ IP masking ” in Universal Analytics (UA)”
Is location tracking explicitly excluded?
“The policy mentions collecting general location but does not explicitly exclude precise location tracking.”
Third-Party Protection4/7
Does it explicitly state no selling of data?
“PhET does not share, rent, or sell any PII (name and/or email) to third parties for advertising”
Are third-party providers named?
“through the use of Google Analytics tracking services Clever is a supported federated login provider.”
Are providers contractually restricted?
“The policy mentions third parties performing tasks consistent with the policy but does not mention contractual restrictions.”
No-targeted-advertising commitment?
“We do not allow any third parties to use any user’s data to create an automated profile... or target advertising”
Is AI/ML data sharing addressed?
“AI or machine learning data sharing is not addressed in the policy.”
Child-specific sharing restriction?
“The policy states no PII is collected from children, but does not explicitly detail child-specific sharing restrictions.”
Cookies/tracking limited or opt-out?
“view PhET's Cookie Policy to find detailed information about the cookies we use and how to set your cookie preferences.”
Deletion & Retention5/5
Can users delete their account?
“Users have the ability to view, modify, or delete their own information.”
Self-service deletion mechanism?
“provide instructions for users to change their password and instructions to delete their PhET account.”
Specific data retention timeline?
“PhET may email users after 5 years of inactivity. If the user does not sign into their account within 30 days...”
Auto-deletion of inactive accounts?
“If the user does not sign into their account within 30 days of that email, the account may be deleted”
Post-deletion handling described?
“Upon user account deletion, user PII is removed from all active databases. User PII may be retained indefinitely in automated backups”
Advertising3/4
Advertising model explicitly disclosed?
“No advertisements or ad tracking technologies are utilized by PhET in our simulations or on our website.”
Free from third-party advertisements?
“we do not use traditional advertisements, behavioral advertisements, nor ad tracking on the PhET website”
Children excluded from ad targeting?
“We do not allow any third parties to... target advertising to students, parents, teachers, or the school.”
Ad-free option available?
“The service is ad-free by default; no specific ad-free option is mentioned.”
What This Means
This app does not provide adequate data transparency for parents. This may mean you cannot easily access your child's data, understand what information is collected, or request deletion of personal information. We recommend considering alternatives that provide better data transparency, or using our template letters to request your data rights be honored.
About this evaluation: Based on automated analysis of PhET Interactive Simulations's privacy policy using the Common Sense Privacy Program framework. Evaluation covers 35 binary checks across 6 dimensions. Privacy policies can change — this evaluation reflects the most recent version we analyzed.
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For PhET Interactive Simulations
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- Pricing
- FREE access to all PhET simulations for students and teachers from the PhET website. iPad and Chromebook PhET App - which enables offline use - available for purchase ($0.99). No student or teacher login required.
- Platforms
- Web Browser, iOS (Apple mobile), iPadOS (Apple tablet), Android (Google mobile), Windows (Microsoft), macOS (Apple), Chrome OS (Google)
- Grade Levels
- Transitional Kindergarten, Kindergarten, 1st Grade, 2nd Grade, 3rd Grade, 4th Grade, 5th Grade, 6th Grade, 7th Grade, 8th Grade, 9th Grade, 10th Grade, 11th Grade, 12th Grade, Associate's degree, Bachelor's degree, Adult Education
- Website
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