For teachers
Set a route, collect completion codes
Pick a tour or a set of labs and share the class link. Each student works in their own browser; at the end they give you a short completion code, which you check below. No accounts, no sign-in, and nothing about your students is sent anywhere.
1 · Make a class link
2 · Check completion codes
3 · Printable worksheets
One page per tour: each stop's prediction question with boxes to tick and room to explain — for classes without a device each.