RamanSim turns the hardest ideas in your maths textbook into things you can drag with your finger — built for Class 7 students, free for every school.
Each simulation opens straight onto something you can move — the idea reveals itself as you play. Works on any phone, in English or Telugu.
Two arms, one angle. Drag it and find out when two shapes become true twins.
Open simulation →Test SSS, SAS, ASA — and a free-explore mode that names the rule as you build.
Open simulation →Same measurements, two different triangles. Discover why SSA can't prove congruence.
Open simulation →Why does minus times minus make plus? Put tokens in, take them out, and watch.
Open simulation →Add and subtract integers as moves on a number line — the carrom-coin idea from your book.
Open on PhET →Keep the pattern going past zero — the sign rule reveals itself, nobody has to tell you.
Open simulation →Stack the shared blocks — watch the common floor become the HCF, the tallest tower become the LCM.
Open simulation →Find the biggest square tile that fits a room exactly — no cutting. The answer is always the HCF.
Open simulation →Sir C.V. Raman won India's first science Nobel using simple, inexpensive equipment — proving that great science doesn't need great budgets. RamanSim carries that spirit into the classroom.
Most students meet maths as rules to memorise. We think the hardest ideas become easy the moment you can see them move. So every RamanSim simulation opens onto something you can drag, with the explanation arriving only after you've already felt how it works.
Built for Class 7 students in Telangana, aligned to the new Ganita Prakash textbook, in English and Telugu — and free for every school, the way PhET has always been.
You're dragging something within three seconds. No walls of text before the fun.
The surprise comes from your own hand, not from a paragraph telling you the answer.
Light enough for a low-cost Android on a slow connection. Telugu or English, your choice.
For schools, this costs nothing. That's a promise, not a trial.
You tried a simulation — now tell us honestly. Every answer shapes what we build next. Teachers, students, parents: all welcome.
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