Hi and welcome to Teacher Focus! You might want to check out what professional development providers are writing and teaching for universities in online courses for teachers. Most of these are in education technology areas since that is what colleges/universities seem to request these days. I have contracts with several universities (some through professional development providers) for online teacher education courses. Every single course I will be teaching from April through summer (about 6-8 courses) and the courses I have been contracted to design are educational technology.
Take a look at what your university offers in the way of ed tech for teachers. There is no end to the courses you can design and teach in ed tech areas