I agree completely with the previous post.

It's easy to see the curve evens out in the end. The histograms on the right are solid proof.

And, yes, lots of people have pre-final A's in Dr. Bertello's class. Many are devastated after the final.

Bertello is a very nice guy, very approachable, patient, and friendly. His class is also very easy because he lets you know what will be on the exam. That is to say, his practice exam is almost like the actual exam, except he asks for a different element (for instance, he asks for 'final velocity' on the practice exam. He will ask for 'time' or something else on the actual).

The problem-- what makes it difficult-- is that everyone does well, which makes the curve ridiculously skewed to the right. Class average is SO high, it is in the 90's. What chance have you if for any reason you don't do well on one exam? Everyone is already clambering to get over 90. About (over) half the class has a pre-final 'A.'

He covers only a few types of problems in class, but not because he can't do difficult problems. He's intelligent and knowledgeable in the subject, and he'll help you with a miscellany of problems if you go to his office (he's always there when he's not teaching a class). It's just that he believes those kinds of problems are most important. But I'm not convinced that's a great idea if you don't have him again as your professor for the next class in the series.