Write the task, point it at the simulators, and put a six-character code on the board. Your class does the experiment in The Lab, writes it up in The Office, and hands it in to you here.
26 characters, 10 left out — 0 O 1 I L 5 S 2 Z all look like something else.
The brief has headings, lists, emphasis and real equations, the same as the report editor, because "verify v² = u² + 2as" is a normal thing to set. Tell the class what branch it's on and those simulators come first and get marked. Nothing else is hidden.
Saving a mark and giving it back are two separate buttons, on purpose. A half-written comment never shows up on a student's screen. Try it: save, then look at what the student sees.
Handed in. Your teacher has it — you will see a mark here when it comes back.
A student who opens the work again after it comes back doesn't reset it, so your mark never looks out of date. You can still change it afterwards.
No setting in any app can stop a second browser tab, and we won't pretend this one can. Exam boards tell centres to turn AI off at the network for exactly that reason. What you get here is an honest decision per task, off by default, and a record when it's on.
The lab partner is not available on this task.
When it helps you word a task it's given the class name, its branch, the title and the simulators. Never the class list, anyone's work, or a mark.
Archive a class, remove a student, leave a class: their experiments and write-ups stay theirs. Every one of those buttons says so where you press it.
Archived classes don't count, so July isn't a wall. Click a slot to archive it. It keeps everything.
The 35th is never turned away. You're told, and you get the rest of the term to sort it out.
Post a write-up from The Office and the class gets a copy. Edit or delete yours later; theirs doesn't change.
Every screen and every step is real. These are the parts that aren't, so you know before you plan a term around it.
The Classroom comes with the class plans. Your students reach it through your licence, not their own.