Lecture/Discussion
Professor Mazzocco mainly discusses theory in the lectures (PowerPoint slides are always posted) so learning how to do problem sets and applying the theory is on your time. It's important to go to discussions, which is where the TA will teach you how to do the problems.

Exams
Professor Mazzocco drops your lowest midterm and problem set grade. There are 2 midterms, 1 final, and about 6 graded problem sets. He allows a 1-page "cheat sheet" on the exam. Midterm structure is 10 multiple choice questions and 3-4 short answer problems with multiple parts (similar to the problem sets). Multiple choice is basically mostly theory (study and memorize PowerPoint slides) and there are several calculation multiple choice questions. He posts up his previous midterms so be sure to use them to study. I advise you to do them first without looking at the answers to see how much you know and what you need to study more on.

The first midterm was pretty difficult and there was not enough time for most students. Second midterm was simpler and a lot of people did extremely well. Final was challenging and complex.

Overall
Professor Mazzocco is really nice and understanding of his students. He is pretty funny as well so the lectures are not entirely boring. We sped through the market demand/equilibrium chapter on the last class before the final but he did not put that chapter on the final. Before the curve, I calculated a B as my final grade but I ended up with an A. It's not difficult to do well in his class with his flexible grading policy. Highly recommended! I would not hesitate to take him again.

I took Econ 11 with Mazzocco in Fall 2014. Let me start of by saying Mazzocco is a nice guy. But the problem lies in his breaking down of concepts. He makes them seem extremely simple in weeks 1- 3 which does not prepare you for the midterm at all. Most people in my class got screwed over on the tests because they were so much harder than his lectures. This class destroyed my GPA in a sense as it also underprepared me for econ 101 and 102. I came into Mazzocco's class as a 2nd year with a 4.0 with As in Math 31A and 31B but my gpa was ruined by my 3rd year due to Mazzocco's class and the after effects.
I would suggest taking it with Sproul or Garcia or just waiting for a quarter as Econ 11 with mazzocco is a bloodbath.
Avoid this class especially if you are an econ/ bus econ or math econ major.

Mazzocco makes material fun and interesting. His tests are pretty hard as expected in this class and a really annoying thing is the fact that the majority of these econ classes are international students who are extremely good at math. I am not being prejudice or anything, his class is full of students who are prepared well for his class because they have already taken crazy difficult math classes in their home countries so they make the average grade higher.

Anyway, he grades really fairly, IF YOU CAN, TAKE GALLUZZI AS A TA!!! he is seriously amazing.

My advice is, do poorly on one midterm. Do well on another, because he drops the lowest one AS LONG AS IT'S LOWER THAN THE FINAL. So do poor on one midterm. The first midterm was harder than the second, but I think thats just because we didn't know the material as well.

I got a D on the first midterm, a C- on the 2nd, and ended up with a B- in the class, so he does curve very generously because he really does want everyone to do well.

I got an A on this class.
I agree with the poster below me, Alessio Galluzzi was absolutely terrific as a TA. He made a huge effort to help the students. Mazzocco was also pretty good. His lectures were decent. In my opinion, his tests are optimal for students who understand the intuition behind economic concepts.

As for the slight about international students from the poster below: whose academic inadequacies does your comment really display ?

This class can only be taken if you are taking Econ 11 with Mazzocco during the same quarter. He will make an announcement during his Econ 11 class telling you to send him an email if you want a PTE number to be enrolled in this class. I would recommend everyone to try and get into this seminar.

This class met 5 times during the quarter for 2 hours at a time each. There were 5 readings and although they were long, the topic was very interesting. Professor Mazzocco was very engaging and made the class extremely fun. There is one final paper at the end of the class.

Textbook is useless, don't get it. Mazzocco reviews all the calculus you need to know during the first few lectures which was very useful for students who have never taken multi-variable calculus before. I had Richard Domurat as a TA and he was extremely helpful, would recommend. All you need to do to study for exams is review the past exams he posts online.

Midterm One Average: 82%
Midterm Two Average: 68%
Final Average: 69%

I think Mazzocco is the best professor that teaches Econ 11. The material is somewhat challenging but he is a great teacher and provides students with all they need to be successful. I studied the previous exams and ended up getting As or Bs on the midterms and Final. As for the TAs, I wouldn't go to my discussion or my TAs office hours, because Galluzzi was just that good.

Take this class with Mazzocco if you can.

This class is difficult in general. Teacher uses slides but they don't necessarily help with homework since the slides are very generic, but still contribute. Try to get a good TA because that's what will really help you in the class. My only complaint would be the final. He gives previous finals (and midterms) to study for the tests from every year since 2010, however the finals previously given were SO much easier than the one given this quarter. Midterms consist of 10 conceptual multiple choice and 3 free response math questions with multiple parts. Yes there is a curve depending on how the class does as a whole. He will drop your lowest midterm if you do better on the final and the other midterm.

BEST PROFESSOR EVER! Engaging, smart, helpful, clear... everything you'd want in a professor. TAs--for the most part-- were really good too!

He's a really good and engaging lecturer of material that can sometimes be very dry. Slides are posted after lectures, which is nice and very useful for the homework, but he never uses the textbook, so save yourself the $100. Homework is fair and not too challenging. Exams are also fair, but all three were fairly challenging, but Mazzocco posts every exam from the last six years for you to prepare with, which is really useful. He'll also drop the lowest midterm if you do better on the other two exams. Mazzocco's also very accessible and helpful during office hours, and for some reason, almost no one shows up, so you're able to talk to him one-on-one. Having a good TA is also very helpful. I had Vitaly Titov, who was excellent, though having gone to all of the TA-led review sections, that might've been an exception. One last note, the class is extremely competitive and curved, so make sure you don't fall behind. Overall, Mazzocco does a good job teaching, and is a good choice for Econ 11.