Blackboard is the learning platform. What it can tell an instructor about AI use depends on which tools a school switches on inside it.
Why the answer depends on your school
Two schools on Blackboard can give very different answers to the same question. One may run Turnitin on every written assignment; another may rely on SafeAssign alone, which looks for matching sources and says nothing about AI. Your syllabus or your school's academic integrity page is the place to check.
Checking a draft yourself
For a second look before you submit, paste at least 80 words into the checker on this page. You get a 0 to 100 human score with the sentences that read as machine-written highlighted. Treat it as a prompt to revise or keep notes, not a prediction of what another detector will say.