The phrase "have been being introduced" confuses me. It seems to indicate that, at one point, the courses were being introduced. But it does not say that they finished being introduced. It does not say the introduction was completed, or that it ended. Nor does it say that the introduction was never cancelled.
Or, to draw a picture: It seems to say that ...
I introduced essay structure to him.
I see two options for the passive voice. The simpler option promotes the direct object to the subject position:
Essay structure was introduced [to him] [by me].
Both "to him" and "by me" are optional prepositional phrases. The clause "essay structure was introduced" on its own is grammatically complete. The ...
For non-experts in English: You will get into less trouble if you put the subject of the sentence first.
These are clumsy:
Deeply respected by me, Henry and Jack are well known, they came there to tell you something.
Well known people Henry and Jack, deeply respected by me, came here to tell you something.
To make them clear, start with the subject: