PhET Sims (@PhETsims) header
PhET Sims (@PhETsims) profile picture

PhET Sims

@PhETsims

Increasing #STEM literacy worldwide with free interactive simulations! #OER #edtech #math #science https://xitter.cf/t.co/RcgEN208GA

 Boulder, CO
phet.colorado.edu/
Joined September 2010
  • Tweets16K
  • Following13.2K
  • Followers16.4K
1.6KMedia
Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)Photo by PhET Sims (@PhETsims)
Today's the DAY!!! Join the #FREE #EarlyAccess period for PhET Studio right now! Go to phet.colorado.edu/studio to get started crafting your own presets. We can't wait to see what you create! #LaunchDay #PhETStudio #InteractYourWay
Image from PhET Sims (@PhETsims)
2
12
31
3,534
A lot of quantum feels like magic. Quantum Bound States, coming soon, lets students change a system and see its energy levels shift in real time. Follow to hear about sim drops and other PhET announcements!
1
2
251
Are you attending #NSTAIndy26? Stop by the PhET booth to check out new simulations, talk to team members, and maybe get a fun souvenir!
1
4
343
Overheard at #NCTM2026: “Dude, I’m gonna go play.” “These are free??” (Yes. Every single one.) “This session was so practical and applicable.” Thank you to all the math educators who stopped by or joined our session. f.mtr.cool/q3milukwzb #MathTeachers #MathEd #FreeResources
PhET team member presents at a podium beside a large screen showing a histogram in the simulation Projectile Data Lab. Workshop attendees sit at round tables with laptops interacting with the same sim.

ALT PhET team member presents at a podium beside a large screen showing a histogram in the simulation Projectile Data Lab. Workshop attendees sit at round tables with laptops interacting with the same sim.

A PhET team member and educator standing next to a conference booth smiling and reviewing a flyer. The educator wears a backpack and holds a red coffee cup.

ALT A PhET team member and educator standing next to a conference booth smiling and reviewing a flyer. The educator wears a backpack and holds a red coffee cup.

A PhET team member in a light blue sweater at conference booth demonstrating a PhET sim on a tablet to two attendees. One of the attendees is holding flyers.

ALT A PhET team member in a light blue sweater at conference booth demonstrating a PhET sim on a tablet to two attendees. One of the attendees is holding flyers.

Person interacting with the simulation Projectile Data Lab on a tablet at PhET's exhibit booth. In the background there is a sign that says "160+ free simulations," and a PhET team member standing with a backpack and a phone.

ALT Person interacting with the simulation Projectile Data Lab on a tablet at PhET's exhibit booth. In the background there is a sign that says "160+ free simulations," and a PhET team member standing with a backpack and a phone.

2
3
15
875
Three emojis. 🐰 🐺 🧬 Name the PhET sim. 🔍 Clue: it's a biology sim #biologyteacher #biology  Guess in the comments.
Image from PhET Sims (@PhETsims)
1
1
2
267
Three free sims to try in class this week. 🎃 Compare launcher data in Projectile Data Lab, find a fair share in Mean: Share and Balance, and build up static charge in John Travoltage. Bonus: each one has a little fall flavor built in. Free at f.mtr.cool/hkmmyc6vxd
3
1
6
507
At NCSM in Denver? Join PhET team member Catherine Carter, Monday, Oct 26, 4–5 pm in Governors Square 14 (Session 452). We’ll share strategies for facilitating K-2 number sense with free interactive sims. #NCSM2026 #MathEd
Image from PhET Sims (@PhETsims)
1
4
397
New sim alert! Check out our free sim Alpha Decay. Half-life isn't when most of the atoms are gone. It's when half are. Now students can measure it themselves. f.mtr.cool/sg78ivp1v7 #ScienceTeacher #ChemistryTeacher #PhysicsTeacher #HalfLife #PhET
1
1
3
316
The vowels have left the building. 🎯 BLNCNG CHMCL QTNS — 26 letters · 3 words. Name the sim. 🔍 Clue: Adjust the coefficients until both sides match. #chemistryteacher  #chemistry  #chemistrygames
Image from PhET Sims (@PhETsims)
1
1
324
Can your students predict where the next particle will land? Fire particles one at a time and watch the pattern build. Quantum Wave Interference is new and free on PhET.  Try it out to share your thoughts. f.mtr.cool/f7ee4agpq8
8
476
Happy #WorldTeachersDay to the educators who bring science and math to life, one sim at a time. We made these frames for you. Visit twibbonize.com/proud-phet-te… Swipe to pick a frame, add photo, download and share it on your story, feed or WhatsApp Tag @phetsims #ProudPhETTeacher
Image from PhET Sims (@PhETsims)
Image from PhET Sims (@PhETsims)
Image from PhET Sims (@PhETsims)
Image from PhET Sims (@PhETsims)
1
5
426
Dear Teachers, we've been meaning to tell you.... WHAT YOU MEAN TO US! Happy #WorldTeachersDay #PhETsims #ProudPhETTeacher
Image from PhET Sims (@PhETsims)
Image from PhET Sims (@PhETsims)
Image from PhET Sims (@PhETsims)
Image from PhET Sims (@PhETsims)
6
2
1
9
610
Image from PhET Sims (@PhETsims)
Image from PhET Sims (@PhETsims)
2
89
If atoms decay at random, how can half-life be so predictable? PhET developer John Blanco shows what happens when you watch a thousand atoms at once and why that randomness becomes something scientists can count on.
4
8
578
Happy International Translation Day! 🌍 Hundreds of volunteer translators have brought PhET sims to students in 132 languages. Thank you to every translator for every hour and word you've contributed. Find sims in many languages: f.mtr.cool/sukg7lb4of
1
1
3
463
Three emojis. 🧀 🍞 🥪 Name the PhET sim. 🔍 Clue: it's a chemistry sim, and it really does start in the kitchen. #chemistryteacher #chemistry #stoichiometry Guess in the comments.
Image from PhET Sims (@PhETsims)
1
1
2
463
Get a sneak peak at the Photoelectric Effect simulation being released soon, and learn more about what makes it so effective. Explore our free quantum sims on the PhET Website 🔗f.mtr.cool/yjlzporth9
1
2
5
536
Which one doesn't belong? 🤔 01 Build an Atom, 02 Build a Fraction, 03 Build a Molecule, 04 Build a Nucleus. Three share something; the fourth doesn't. Which is the odd one out?  What's the rule?
Image from PhET Sims (@PhETsims)
4
2
6
845
Correct answer: Build a Fraction 🍕 But we did come across another answer that we’d give full credit to.
78
Fire one particle at a time through a double slit and an interference pattern still shows up. You could never watch that in a real lab. Our new quantum sim lets students watch it.  f.mtr.cool/1gv94lalcx #QuantumPhysics #ScienceTeachers #TeacherResources
1
1
374
One sim. Four concepts. 🎯 #Balance. Proportional reasoning. #Torque. #Lever arm. Which PhET sim covers all four? 🔍 Clue: Your students have all played on one at the park. Guess in the comments. #physicsteacher #iTeachPhysics  #phet
Image from PhET Sims (@PhETsims)
1
1
440
Ready for the answer? Check out the free sim “Balancing Act” phet.colorado.edu/en/simulat…
Balancing Act

Balancing Act

Play with objects on a teeter totter to learn about balance. Test what you've learned by trying the Balance Challenge game.

phet.colorado.edu
2
82
The vowels have left the building. 🎯 MK TN — 8 letters, 3 words. Name the sim. 🔍 Clue: it's turns around. Drop your guess below.  #mathteacher #elementarymath  #numbersense  #mathgames
Image from PhET Sims (@PhETsims)
1
490
Drumroll 🥁🥁🥁 for MAKE A TEN!
Image from PhET Sims (@PhETsims)
1
167

No more items