Miro

A collaborative online whiteboard application, free to use in Higher Education. Create whiteboards of almost unlimited size, add frames to organise content, share the whiteboard with anyone via a link, collaborate together live from anywhere in the world. Content that can be added includes: text, images, drawings, shapes, video embeds, diagrams, sticky notes, comments, tasks (assigned to people with dates), and much more. Thousands of templates are available, including all of the standard diagram types for design and management. Users can create and share their own templates.

For a more structured collaboration whiteboard consider the mind mapping and concept mapping tool Mindomo.