As you are aware, there are some great photography resources 'up in the cloud'; and many of them are free,
In case you are not aware a new one has been added by Google: an introduction to the scientific, artistic, and computing aspects of digital photography.
Topics include lenses and optics, light and sensors, optical effects in nature, perspective and depth of field, sampling and noise, the camera as a computing platform, image processing and editing, and computational photography. It also covers the history of photography, looks at the work of famous photographers, and talks about composing strong photographs.
This course is based on CS 178 (Digital Photography), which was taught at Stanford from 2009 through 2014. The link is to the Google version.
The course consists of 18 lectures. The topics, with dates, are given in the course schedule. The lectures were delivered live on Google's Mountain View campus, broadcast live to Google offices around the world, and recorded for later playback. The videos linked into these web pages are from those recordings, edited slightly to remove discussion of Google internal projects. Keynote slides from these lectures were converted to PDF files and linked into the schedule after each lecture.
Marc Levoy, the Professor Emeritus of Computer Science at Stanford, and Principal Engineer at Google, has made his material freely available, but some of the photographs included in the lectures are individually copyrighted. Please respect copyrighted information.