Random Group Generator for Labs, Projects, and Cooperative Learning

Three Different Grouping Problems, Not One

"I need to put students in groups" covers at least three different jobs, and they don't call for the same tool. If the class just needs to be split into a set number of teams for today's activity, any quick shuffle handles it. If the same class has been grouped every week for a term and the same four friends keep landing together, the problem isn't splitting the list — it's proving the split wasn't rigged, even by accident. And if the roster lives in a spreadsheet already, from a gradebook export or a shared class list, retyping thirty names by hand is its own separate waste of a prep period.

The Random Group Generator is built around that third case as much as the first two. Names can be typed directly, or imported from a .txt, .csv, or Excel file up to 2MB — the tool recognizes common name-column headers automatically, falling back to separate first/last name columns if that's how the sheet is structured. Imported files are read directly in the browser and never uploaded anywhere, and there's a 1,000-name ceiling, which covers any realistic class roster with room to spare.

Groups are set by count, not size — choosing "4 groups" splits the list into four groups as evenly as the numbers allow, rather than asking for a group size and letting the group count fall out however it lands. When a roster doesn't divide evenly, the leftover students distribute into the existing groups one at a time rather than forming their own visibly smaller group. The shuffle itself is a standard, unbiased randomization — every name has an equal chance of landing anywhere — which also means an unbalanced-looking split, three quiet students in one group, say, is possible purely by chance, the same way it would be with any genuinely random process. An optional toggle assigns one student per group as a leader, chosen the same random way, not by ability or seniority. A class or activity name typed in at the top is capped at 80 characters, plenty for a printed title bar.

What Doesn't Carry Over Between Sessions

A finished group list can be saved for later — up to 20 saved sets — but that's stored locally in the browser you're using, not synced to an account or available from a different device. A teacher with a saved class roster tied to their ClassTools24 account can load that roster directly into the tool, which is a separate, account-based feature from the local saved-groups list — the two aren't the same thing, and loading a saved class only works when signed in with one already set up.

Where This Gets Used

Lab partners rotate through new random pairings each unit instead of settling into the same two or three familiar faces all semester. A jigsaw activity can run two grouping passes back to back — expert groups first, then a second random split for the mixed teams — without cross-referencing names by hand between rounds. Review-game teams generated fresh right before the game starts keep any one team from having a standing advantage from being stacked with strong students week after week. And a term-long project that would otherwise sort itself along existing friend groups starts from a genuinely random split instead.

What It Can't Know

The shuffle has no awareness of who shouldn't be grouped together for a documented behavior, safety, or accommodation reason — that's a manual check worth doing every time before sharing a generated list, not something the randomization can account for on its own. It also can't judge reading level, personality, or working style; if a specific group needs adjusting after the fact, swapping one or two names is faster than rebuilding the whole list by hand.

What that split looks like for a roster of twelve, set to 3 groups:

• Group 1 — Maya, Devon, Priya, Liam
• Group 2 — Noah, Zara, Elias, Sofia
• Group 3 — Amir, Ruby, Theo, Ines

Run it again on the same twelve names and the groupings change — that's the shuffle working as intended, not a bug to double-check.

Privacy

Group lists are usually just first names or initials, which keeps the privacy exposure low, but a generated list is still a classroom document — worth keeping to the class rather than posted publicly. Don't add notes explaining why a specific student was grouped or kept apart from another; that kind of detail belongs in a private record, not on a list students might see. If a roster file is imported for this tool, remember it's read in the browser only and never sent anywhere, but treat the file itself with the same care you'd give any class roster.

FAQ

Does this split by number of groups or by group size?

By number of groups. Choose how many groups you need and the roster splits into that many, as evenly as the count allows.

What happens when the class size doesn't divide evenly?

The extra students distribute into the existing groups rather than forming a separate leftover group of their own.

Can a roster be imported from a spreadsheet?

Yes — .csv and Excel files up to 2MB, with automatic column detection for common name-header formats.

Do saved groups sync across devices?

No. Saved groups (up to 20) live in the browser's local storage on the device where they were saved, not in an account. Loading a saved class roster is a separate, account-based feature for signed-in teachers.

Can a specific pairing be prevented?

Not automatically — the shuffle has no awareness of behavior, safety, or accommodation considerations. Review a generated list before sharing it and adjust manually if needed.

Fair, Not Infallible

A genuinely random split solves the fairness problem that self-selected or memory-based grouping never quite does — no clique controls who ends up where, and nobody can point to favoritism in a shuffle. It doesn't replace a teacher's judgment about a specific pairing that needs to be avoided; it just removes the ninety seconds of low-value sorting that used to happen before every group activity could actually start.