Learn English – Passive voice of split off

In the US we typically say that classes are offered rather than given

The preposition will be by or at, not from.

What is offered is more likely to be courses than classes. Classes tends to be used more in secondary-school or non-academic contexts.

So:

English courses for people whose native language is not English are offered by that university.

But note: the passive is awkward in this instance. Other things being equal, English prefers to put “heavy” constituents—those with many words—at the end of a sentence rather than the beginning or middle, because the syntactic structure is most visible when the primary constituents are close together at the front. Compare the structures for the passive and active sentences:

[Subj _{^{English courses}} MinAdj _{^{for people whose native language is not English}}] [Verb _{^{are offered}}] [MajAdj _{^{by that university.}}]

[Subj _{^{That university}}] [Verb _^offers] [DirObj _{^{English courses}} MinAdj _{^{for people whose native language is not English.}}]

In the passive sentence, that's a long run from Subject to Verb. In this case you could get around this by moving the “minor” adjunct to the end:

English courses are offered by that university for people whose native language is not English.

[Subj _{^{English courses}}] [Verb _{^{are offered}}] [MajAdj _{^{by that university}}] [MinAdj _{^{for people whose native language is not English.}}]

I prefer 1, actually. Change is an inherently passive thing, you can't stop change, change happens for its own sake. It's perfectly fine to say "standards have changed" because standards are always changing.

It's like "events have happened." The events themselves have no power to happen or not. There are plenty of fictional events that never happened except in books, and the event itself can't change that. Happening is an agent, it is the bringing into reality itself.

That said, 2 is grammatical, but less poetic. It calls to mind that there is a process to change standards, and that process has happened, instead of just saying that things are different now, and it doesn't matter why.