If you need help finding the right tool to create content for your course, the following list is a good place to start looking for ideas.
Canva – easily create and download graphics (offers free Pro accounts for non-profits)
Loom – record, edit, and share videos (free Pro accounts with 45 minute video length are available to teachers and students).
Openclipart – clipart, all licensed under CC0 (free to use and modify, no attribution required)
Pixabay – photographs and clipart, all licensed under CC0 (free to use and modify, no attribution required)
Prezi – presentation software, alternative to PowerPoint
Screencastify – record and share videos up to 5 minutes long (Google Chrome only)
Screencast-o-matic – record and share videos up to 15 minutes long
Tuxpi – free image editing tool (including fade effects)
Unsplash – photographs, all licensed under CC0 (free to use and modify, no attribution required)
Wikimedia Commons – media files, all licensed under Creative Commons (some images require attribution)
Webresizer – image resizing tool