Apart from the posts about who should be responding to this, I have done life drawing for years. On the other hand, I’m not a dad and I’m not even a man.
30 short poses does sound a lot. We normally do about half a dozen at the beginning of the class to loosen up.
The class I’m in at the moment has a different model each week, which is fantastic. I did get fed up with classes where we had the same model for a whole term.
I do think that the teacher should probably have told you in advance that so many different poses were going to be needed.
On the other hand, perhaps they did not all need to be very different from each other. What you could do is perhaps work your way up from the floor to sitting to standing, which would give you around three or four poses at each level and then work your way back down again? Remember that from the point of view of the person drawing, in a class, people do appreciate being able to draw a different aspect of the model, so you could rotate as well. That would mean that with the same pose, you’d give someone a different view with different challenges such as foreshortening, even if you were using the same pose several times.
Also, it’s useful to incorporate a prop, such as a chair or a large pole to lean against or hold across your shoulders, et cetera, et cetera.