Can the university force me to share my courses publicly online? I want to use my course material to write a book in the future

Can I rightfully refuse to use the school's platform?

TL;DR: legally, probably not, but you are still more or less in the right according to the norms of academia.

Longer answer:

This isn’t so much about rights in the legal sense. The underlying context is that there is a longstanding tradition in academia that faculty own the rights to written (and other) media they create as part of their work. This is the case in the US where these rights are pretty universally respected as far as I’m aware, and in many other countries, and is true despite the fact that legally, in the US at least, employers in general can (and, outside of academia, generally do) assert ownership of all intellectual property generated by employees in a work context.

In other words, academic institutions have quite intentionally and explicitly given up some of the legal ownership rights they are in principle entitled to. As far as I understand, the guiding philosophy here is that faculty exercise a lot more freedom and control over what kind of materials they produce compared to employees in other sectors. That means the work is regarded as being of a more personal, creative nature, and it was decided long ago that that should mean that faculty would be the owners of the work. (Note: I am talking specifically about copyright; for other forms of IP like patent rights, a quite different philosophy and different policies typically apply.)

Coming back to your question: I think you are quite right to be concerned. Your university is at the very least showing itself as somewhat deaf to these very old and well-established ideas. But can you “rightfully refuse”? Legally, that’s less clear. But it would be quite reasonable to express a concern. At my university the administration has provided reassurance to faculty that their copyright over teaching materials would be respected during the COVID-19 crisis, and we were given quite specific explanations on how our rights would be balanced against the need to deliver our teaching remotely, including providing recordings, what steps we can take to prevent students from sharing our materials, and more. Perhaps by raising the issue you and your colleagues can push your own administration to also think this through a bit more.

Let me finish by encouraging you to also adopt a more flexible and tolerant mindset. All of us are called upon these days to get out of our comfort zone and appear in online videos and recordings, use online platforms with awful records on privacy, and generally engage in activities that in normal times we might consider distasteful and privacy-violating. We do this with the understanding that exceptional times call for exceptional measures, and that the highest priority right now is to keep the lights on at our institutions. As I said, I think your concern is reasonable and probably you can reach some sensible understanding with your administration about your class materials. But while you discuss the issue with them, try to keep some perspective and not make yourself too much of a pain in the butt. As important and valid as this is, people do have worse things to worry about these days.

There are a couple of things that are important to understand in this context:

Copyright ownership: The school

First and foremost it's absolutely crucial to acknowledge that if you are getting paid to do something, for example preparing and giving courses, then it's totally the schools right to decide what to do with that work. If they want to offer the fruit of your paid work only to the students that pay them: Then they can. If they want to offer the fruit of your paid work to everyone who pays a fee: Then they can. If they want to offer the fruit of your paid work for free to the world: Then they can. (Not to say that their ability couldn't be contractually more limited than this, and for that you would have to check your contract, all I am saying here is that this is the default position from which you start).

Tradition and the unique relationship in academia

At the same time it needs to be acknowledged that certain parts of the academic world have grown very accustomed to doing something a certain way and it can occasionally feel like you aren't just an employee. Especially those who can pull in a lot of external funding tend to be given a lot of free reign, so this relationship can grow a lot more complex. Nonetheless, at the end of the day in most situations the university will still expect a certain amount of time spend on educational duties. Point is that it's understandable that you feel surprised by a request like this.

Another way academia differs from other organizations is that when you move from one place to another place it has been accepted that you take your work with you. In contrast if you were giving courses in a more non-university/non-academic environment (speaking from experience working for a brief period in a private re-education program) it would be expected you would leave your courses with your old employer and write and design new stuff for your new employer. And at the same time the old employer would hire someone to continue working with whatever you produced and prepared.

Why does the academic world not do that? I would argue that that's because there is an underlying understanding that we want to share and improve the world for everyone. And that even goes so far as allowing their employees to independently publish the work they worked on in their employ. In the past it wasn't realistic for universities to directly publish everything everyone worked on, so if someone got their work published that was a win-win-win. The author got credit and a bit of money, the university got another work they can use in their courses and the public/other academics also get access to that information. As publishing becomes cheaper it's not unnatural to expect this to change (as has for example happened with some universities which published video recordings of all lectures online).

Your copyright

Likely however due to the history of the academic world both you and your university have the legal right to do more or less whatever you want with the work you created (regardless of whom holds the copyright, the other party will have a very broad and far reaching license). So the thing I just wanted to point out that even if you publish whatever you have right now on the university platform, it probably won't in any way stop you from publishing a more detailed work in the future. Publishing it there won't typically give anybody the right to do anything with it beyond reading it, so you don't have to worry about someone running of and publishing it.

Do you have a union? Or a fculty association? At the university from which I retired a few years ago, the faculty association is a union, in the full sense of labour law. They can and should advise you on your legal rights and represent you in dealing with the administration. In my jurisdiction, a union is legally obliged to act on behalf of its members, even if it's an issue they would rather avoid. The legal issues are very complex and they vary greatly from one place to another. Long-standing custom is one thing to look at but that is not the same as a contract. Trying to be your own lawyer is akin to expecting a lawyer to teach your course on topological algebra. You might consider, after consulting with legal representation, whether you should go along with the administration's request or directive but at the same time sending a registered letter to the university administration stating that your compliance is not to be construed as an abandonment of any of your ownership rights, copyright or otherwise.