Thanks to an email from a reader I was alerted that a few of the online whiteboard tools that I have reviewed in the past are no longer working. Here’s an updated list of online whiteboard tools that you and your students can use for free.

Scratchwork is an online whiteboard and video conferencing tool designed with math students in mind. The platform works like many similar services as it provides you with a whiteboard on which you can draw, type, and import images to annotate. Scratchwork is a little different than other services because it includes a Latex editor for writing equations. Scratchwork also offers an option to draw on a tablet and import those drawings. The collaboration aspect of Scratchwork comes into the picture when you activate the video conferencing component built into Scratchwork.

Draw Chat is a free service that allows anyone to create a video chat over a whiteboard, PDF, image, or map. To use Draw Chat you just have to visit the site and click “Start New Whiteboard.” Once your whiteboard launches you will have the option to enable access to your webcam and microphone. You can have people join your whiteboard video conference by sending them the link assigned to your whiteboard.Draw Chat allows you to draw or type on a shared whiteboard. Additionally, you can upload a PDF or an image to annotate on the whiteboard. A fourth option for drawing on Draw Chat is to import the URL for a Google Map and draw on that map.

WebRoom is a free service for hosting online meetings. WebRoom doesn’t require you to download any software and you don’t need to register in order to use it. WebRoom lets you use your webcam if you want people to see your face during the meeting. A whiteboard space is provided.

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