Assignments taken and re-used without consent I'm a TA at a British university, and as part of this job role I create and write educational material, which also includes creating and marking assignments.

I've recently discovered that several of the assignments I wrote have been taken by a colleague, my name then scrubbed off them, and distributed as part of this colleague's assessment strategy. My colleague did not tell me he was going to do this, and I feel as though my hard work has been/could be unfairly attributed to my colleague.

I feel aggrieved by the situation, but am I being unreasonable before I decide to escalate this matter?
I am a professor in a UK university.  I would say that it is standard that if you teach a course and then hand it on to someone else then you should hand over all your teaching material, which your successor will typically modify to their taste.  Moreover, people do not usually keep track of authorship, except possibly in the case of a full set of notes that is similar to a book.  Of course it is polite for people to be open about what they are doing and to express appreciation for any material that they inherit.