If you are a secondary school student in Singapore looking for a better way to understand chemistry, biology, or physics, you have probably spent hours reading through textbooks and staring at static diagrams. The problem with static diagrams is that science is not static. Electrons move. Particles collide. Membranes stretch. To truly understand what is happening, you need to see it in motion — and ideally, you need to be able to control it yourself.
That is exactly what EdTechSims offers: a free library of interactive science simulations built specifically for Singapore secondary school students.
What Is EdTechSims?
EdTechSims is a Singapore-based educational platform that hosts dozens of interactive simulations, virtual labs, and game-based learning activities across chemistry, biology, physics, mathematics, English, Chinese, geography, and history. Everything on the site is free to access — no login required, no subscription, no paywall.
The simulations are designed to complement what students learn in school, not replace it. They work best as a revision tool, a pre-lesson primer, or a way to check one’s understanding before an exam.
Chemistry Simulations
The chemistry section is one of the most comprehensive on the site. For O Level students, you will find interactive tools covering:
- Electrolysis and selective discharge — adjust the concentration of solutions, change electrodes, and observe which ions are discharged and why
- Qualitative analysis — test for cations, anions, and gases using virtual reagents in a simulated lab environment
- Collision theory and reaction rates — vary temperature, concentration, and surface area, and watch how particle collisions change
For A Level (H2 Chemistry) students, there are more advanced tools covering buffer capacity, energy level diagrams and spdf orbitals.
Biology Simulations
Biology students can explore:
- Diffusion and osmosis — watch particles move across membranes in response to concentration gradients
- Photosynthesis and cellular respiration — understand the inputs, outputs, and limiting factors of these paired processes
- Genetics and inheritance — explore Mendelian genetics and work through inheritance problems interactively
Physics Simulations
Physics tools on the site include:
- Convention current and electron flow — compare virtual circuits
- Simple harmonic motion and pendulums — change length, mass, and amplitude, and observe the effect on period
- Thermal radiation and heat conduction — explore the factors that affect the rate of energy transfer
Why These Simulations Work
What makes EdTechSims different from a YouTube video or a textbook diagram is that the tools are interactive. You make predictions, you change variables, and you see what happens. This predict-then-observe structure is grounded in how effective science learning actually works: it forces you to confront your assumptions, notice where your mental model breaks down, and update your understanding based on evidence.
Many of the tools also include built-in questions and instant feedback, so you can check your understanding without waiting for a teacher to mark your work.
Who Is EdTechSims For?
EdTechSims is useful for:
- Secondary school students doing self-directed revision for O Level or N Level exams
- Junior college students revising H1 or H2 science subjects
- Primary school students exploring science concepts ahead of PSLE
- Teachers looking for ready-made digital activities to use in the classroom or assign as homework
- Tutors who want to supplement one-to-one sessions with interactive tools
Getting Started
Browse our simulations by subject. Each simulation opens directly in browsers — no installation needed. The site works on desktop, tablet, and mobile, making it easy to use whether you are at home or on the go.
Science does not have to be a page of notes you memorise the night before an exam. With the right tools, it can be something you genuinely explore and understand. EdTechSims makes this possible for free.
