teacher.devBuilding apps for teachers that solve real problemsWe built a way for older students to practice counting money.
Try itBrowse free, accessible apps built with teachers.
A calm classroom safari where shy animals come out the longer your class stays quiet, and get scared away when it gets too loud.
A simple way to make grids, number lines, and more for your tests.
Free generators for clean, printable chemistry figures for tests, worksheets, and slides.
A word-building practice tool where students build and break apart words from the prefixes, bases and suffixes their teacher picks.
A digital First/Then board where a teacher picks a picture for what comes first and what comes next, so a student can see the plan at a glance.
A classroom hall pass tracker where students tap their name when they leave and return, so teachers can see who is out at a glance.
A whole-class review game where one student takes on the rest of the class, and nobody gets knocked out.
Free generators for clean, printable physics figures for tests, worksheets, and slides.
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Our community
Teachers and developers live in different worlds. At the 2026 EdTech-a-thon, we brought them together from July 20–22, virtually and in person in Atlanta, GA, for three days of collaboration, community, and problem solving. The first apps in our gallery were built there.
About the 2026 EdTech-a-thon →
teacher.dev is a 501(c)(3) education non-profit (formerly called BX Coding). teacher.dev is wholly committed to providing free & accessible resources for teachers.
From Boston, Massachusetts, Duncan Johnson is an EdTech researcher and designer. He previously built educational technology for universities and companies alike and published computer science education research with the Tufts University Center for Engineering Education and Outreach.
From Atlanta, Georgia, Elliot Roe is a software engineer passionate about open-source software and educational technology. He previously worked as a research assistant at the Play and Learn Lab, where he developed educational games and supported after-school programs, and built open-source tooling that integrates academic literature with AI for researchers.
An Algebra teacher and web developer from South Lyon, Michigan, Josh Pullen builds practical EdTech apps for his classroom and shares them with other teachers. He has developed interactive math lessons for 3Blue1Brown and is the creator of Shuffle Buddy, a specialized seating chart generator. Josh's work provides simple, effective tools that solve the day-to-day challenges teachers actually face.
A middle school math teacher in Walled Lake, MI, Jessika Golab is a passionate supporter and advocate for her students. Jessika’s classroom is adorned with a wall of over 250 rubber and plastic ducks, each one a gift from a student who appreciates her fun and caring presence. Jessika leads her school’s WEB program, where she trains 8th grade leaders to provide mentorship and support to every 6th grade student as they step into middle school life for the first time.
A Principal Technical Program Manager on Chick-fil-A’s AI Capabilities team, Kara Auger turns emerging AI research into tools that support developers and functional work. Before that, she led product for procurement platforms at Disney, engineered systems at Honeywell Aerospace, and did research at the Georgia Tech Research Institute. She holds a BS in Electrical Engineering and an MS in Cybersecurity from Georgia Tech. Kara has never met an expert who understood a problem better than the person living with it, which is why she is so passionate about the teacher.dev mission.
Yes! Every app in our gallery is free for teachers (no ads either!). teacher.dev is a 501(c)(3) non-profit committed wholly to serving teachers.
Absolutely! Share your idea through our idea form. We build apps based on ideas teachers submit and on comments from our social media pages.
Yes! The code for our gallery apps is public on our GitHub, so anyone can see how they work, suggest changes, or build on them.
Yes. Duncan and Elliot use AI coding agents to help write code for teacher.dev apps. These are the same industry-standard tools that they used in previous software development jobs. Although AI helps us write code, there is no AI within our apps and nothing you do in our apps is processed by AI. For more details, see how we build apps.
Share our apps with other teachers, send us feedback, or, if you'd like, donate. Donations help us keep building apps and providing them for free.
