SimGemma: Democratizing STEM Education with Offline-First AI Simulations

SimGemma is an offline-first, AI-powered platform built by tech lead and volunteer teacher Damodharan to generate interactive 3D science simulations using natural language. Designed for the Google Gemma Challenge, it uses the Gemma 4 model to allow educators in resource-constrained or disconnected classrooms to create physics and chemistry visualizations on demand. The platform also leverages Gemma 4’s translation capabilities to make these simulations accessible in regional languages like Tamil, aiming to bridge equity gaps in STEM education.

Imagine a classroom in a remote village. There’s a blackboard, a few passionate teachers, and curious students. What’s missing? A high-end physics lab. Even more challenging? A stable internet connection. Physics is a subject that demands exploration. It’s hard to grasp the beauty of gravity or the silence of a vacuum from a two-dimensional drawing. This is why I built SimGemma—an offline-first, AI-powered platform designed to bring high-fidelity 3D science simulations to every classroom, regardless of connectivity. I'm Damodharan, a Tech Lead who spends my weekends teaching math and science to kids through an NGO. I've always felt that teaching topics like pendulum motion or trigonometry on a blackboard didn't do justice to the science. These concepts, along with things like molecular structures methane, for instance , are simply better understood in 3D. SimGemma was created for the Google Gemma Challenge to demonstrate how open-weights models like Gemma can solve real-world problems in resource-constrained environments. Traditional STEM education often suffers from two major hurdles: I used to hand-code these simulations in Three.js, but it was time-consuming and hard to scale. I needed a way to generate these artifacts on demand. SimGemma is a "Lab in a Box." It allows educators to generate interactive 3D simulations using simple natural language. The heart of SimGemma is the Gemma 4 model. We chose Gemma for its exceptional performance-to-size ratio, making it perfect for local deployment. We implemented a two-tier offline approach: One of the most exciting aspects of SimGemma is what we call "Vibecoding." In our NGO workshops, we’ve seen that the biggest barrier to using technology in the classroom isn't lack of interest—it's the complexity of the tools. With Gemma 4, we’ve turned the creation process into a conversation. A teacher can say: "Show me a double pendulum where the second arm is twice as heavy, and let's see it in Mars' gravity." Gemma understands the physics constraints, generates the necessary React/Three.js code, and renders it instantly. It turns educators into creators. Living in India, where we have 22 official languages, I’ve seen how language can be a barrier to quality STEM content. Gemma 4’s translation capabilities are a game-changer. SimGemma can generate and translate these artifacts into regional languages like Tamil instantly. This means a teacher can create a simulation in English and have it ready for a Tamil-medium classroom in seconds, ensuring no student is left behind because of a language gap. As a STEM volunteer, I’ve seen firsthand how an interactive simulation can light up a student's eyes. SimGemma isn't just about code; it's about equity. It ensures that a child in a rural NGO workshop has access to the same quality of scientific exploration as a student in a tech-hub city. SimGemma proves that "Offline AI" isn't a compromise—it's a superpower. By leveraging the open-weights of Gemma 4, we’ve built a tool that is resilient, private, and accessible. We are currently looking into: Gemma AI OpenSource Education STEM Physics Remotion ThreeJS