Grades 8–12 · Electricity & magnetism
OpenVidya
Don’t tell me what happens. Make me commit to what I think will happen.
Observe · Compare · Judge · Then model
Electricity
Where to start
Investigation · E1What is charge?Predict, try balloons, face a conflict, judge competing explanations — then earn the charge model. No particle names. No formula dump.Begin →You will need two balloons, thread, and dry hair or wool. Commitments lock until you observe.
Investigation · E2What decides how hard two charges push?E1 showed that charges push. This asks what decides how hard — and ends with the honest answer that your own measurement may not be sharp enough to say.Continue →Needs a bench: eight metal-coated balls, thread, a millimetre ruler, a rubbed rod, and a dry day. Nobody has built this apparatus yet. The page says so on its first screen. It also tells you what to send back if you do.
Investigation · E3How does one charge know the other is there?Two objects, nothing between them, and a force. E2 never mentioned it — and this one ends without settling the question, on purpose.Continue →Needs nothing at all: no balloons, no bench, no dry day. A pencil and your own judgment. That is not a gap in the lesson. Some questions are not settled by measuring harder.
Investigation · E4Why does a comb pick up paper nobody rubbed?The usual formula says a neutral scrap feels no force. It jumps anyway. Two trials, and the second one decides between two stories.Continue →A dry comb and torn paper. Everything here can actually be done, which is not true of E2 yet.
Your models
Models you earn stay available for later investigations.
Open model inventoryWhat comes next
E1 is the first investigation in the electricity sequence. The rest are being built the same way — question first, prediction before answer, model last.