You can do some experiments, which one suits you best:
1)
subject:("Coursework that needs to be completed" -Finalized)
subject:("Coursework that needs to be completed" -{Finalized Rejected})
2)
subject:("Coursework that needs to be completed" -"Finalized: Coursework that needs to be completed")
In the search 1), the "-" minus sign means negation or exclusion.
The 2) will probably rise an alert, on saving, regarding the symbol character ":", however such simple filtering should work as one would expect.
For further info about the gMail search operators see the links:
You might be also interested in the "+" operator, for exact wording: gMail search is greedy/tolerant, so i.e. to force/distinguish plurals/sungulars. (Although in hundreds of my filters I do not use it.)