@Tom 7
You are mistaken.
If I work at home, in my own time, with my own materials and tools, on a project I am doing for me, then that work is mine. If I choose to market the results of that work, then the rights and royalties are mine, too. Only if I use work resources, or do the work during the hours I'm officially at work for my employer do they have any claim to rights over that work. I am aware of some of the dodgy clauses in employment contracts, but I am equally aware of the legality of said clauses: They generally don't stand up in court.
If, as a teacher, I write a book during a holiday, then the rights to that book are mine. If I decide to use that book as part of a course I'm employed to run then, by implication, I am granting the school a fee free license for them to use the book (copy and distribute). They do not, however, have the rights to market that book themselves - and this is what this IPO idea would change. This is dodgy, in my view, but it plugs a source of abuse that some might be exploiting by forcing schools to buy books written by their teachers (which was happening when I was at University, only the University put a stop to it by requiring rights to such works be transferred to the University before they were used. Strangely, when the University started charging for copies of the texts, the lecturers writing the texts started giving the copies out free for 'proof reading'...)
However, what it also seems to be saying is that if I go write a book on programming and a school decides they want to adopt it as a text book, they can do so without paying me a penny, even though there has never been a contract between us, nor is there any implied license granted them by myself. That, in my view, really is copyright theft.