Excalidraw for Teachers: Room Links, No Login

Why Excalidraw?

You need a whiteboard tool that works instantly, requires no login, and lets students collaborate in real time or asynchronously. Excalidraw fits that gap. It's free, runs in the browser, and handles everything from geometry proofs to chemical equations. In under 30 seconds you can share a link and have every student drawing together – no account creation, no permission slips, no IT approval.

No-Account Workflow: Start in 30 Seconds

Open excalidraw.com in any modern browser. That's it. You land on a blank canvas immediately, no sign-up wall. Every new session generates a unique URL. Share that URL with your students – via your LMS, a class chat, or even written on the board. Anyone who opens the link sees the same canvas. Changes appear live. When you close the tab, the board disappears (unless you save it locally or export). For recurring use, bookmark the URL or save the file as .excalidraw and re-upload later.

Using Room Links for Real-Time Collaboration

The simplest way to run a live session is by clicking the Live collaboration button (top right). Excalidraw generates a room link. Send that link to your students. They join without any account – just a name prompt (they can type anything, even a pseudonym). Everyone's cursor appears in a different color. You can see who is drawing what instantly. This works perfectly for:

• Brainstorming flows for a history timeline.
• Solving equations step-by-step as a class.
• Labeling diagrams in biology or physics.
• Peer editing mind maps for essay outlines.

Keep the room link open on your projector while students join on their devices. Use the undo and change history features to walk through revisions together.

Asynchronous Boards: Let Students Work on Their Own Time

Not every activity needs live participation. For async work, you can pre-create a board and share a static link. Students open it, add their own elements (using the duplicate feature to avoid overwriting others), and then export their version as an image or PDF. Alternatively, use Excalidraw's collaborative room but turn off real-time sync by saving the board and re-uploading later. Here's a workflow:

1. You design a template (e.g., a Venn diagram, a lab setup, a blank graph).
2. Export it as .excalidraw and upload to your class folder (Google Drive, OneDrive, or your LMS).
3. Each student downloads a copy, opens it in Excalidraw, fills in their answers, and re-exports.
4. You collect the files and review individually.

This method works well for homework, make-up work, or non‑synchronous online classes. No account required at any stage.

Drawing Math and Science Diagrams

Excalidraw's shape library includes arrows, ellipses, rectangles, and freehand lines – more than enough for most STEM visuals. Key tricks:

• Hold Shift while drawing to constrain lines to 45° angles (perfect for graphs and axes).
• Use the rectangle and diamond shapes for flowcharts and circuit diagrams.
• Add text boxes for labels, equations, or step numbers.
• For LaTeX-like math, use the text tool and write in plain Unicode (e.g., x², √, ∫). Or screenshot a quick equation from a separate tool and paste it in.

Example for a physics free‑body diagram:

1. Draw a rectangle (the object).
2. Draw an arrow from the center pointing down (gravity).
3. Draw an arrow from the center pointing up (normal force).
4. Draw an arrow from the center pointing right (applied force).
5. Label each arrow using text boxes: F_g, F_N, F_app.

For chemistry, draw molecular structures using lines and circles. The grid option (View → Toggle Grid) helps align atoms. You can also import images (PNG/SVG) of complex diagrams and annotate over them.

Practical Classroom Management Tips

Keep these in mind to avoid chaos:

• Set a timer – live collaboration can get noisy. Give 5 minutes for each task, then clear or save the board.
• Name the canvas – use the top‑left title to change it from “Untitled” to “Period 3 – Photosynthesis”. That name appears in the tab and when exporting.
• Lock elements – after you place a background image or template, right‑click and select “Lock” so students don't accidentally move it.
• Export frequently – every 5 minutes, export a PNG to your own device as a backup.
• Use the “View only” mode – if you just want to present, share a read‑only link by copying the URL after clicking “Share” → “Copy link” (not the live collaboration link).

For classes with many students, create multiple rooms (e.g., one per group). Share each group link in a separate chat or channel. You can then “visit” each room by opening its link in a new tab.

Integrating with Your LMS and Other Tools

Excalidraw doesn't have a native LMS plugin, but you can embed boards easily. Copy the live collaboration link and paste it into any page that supports iframes (e.g., Moodle, Canvas pages). Some teachers use a tool like Smartees to create shareable board links that auto‑save to the cloud – no manual exports needed. Smartees also logs student participation, letting you see who contributed what without complex setup. If you rely on Google Classroom, simply attach the .excalidraw file to an assignment and have students open it in the Excalidraw app (they can even use the Chrome extension).

Ready to streamline your classroom whiteboarding? Try Smartees – it integrates Excalidraw boards with your LMS, making sharing and grading effortless.