Lectures were hard to sit through without dozing off and he barely went over any applicable problems or examples in class. He mainly put on slides of proofs or formulas that we could already find in the book. Tests were doable but came out of 120B barely learning anything. Would not recommend this professor.

A lot of people didn't do well, but if you practice the homework problems and make a good notecard you should do fine. I ended up getting above 100% because of the curve. He teaches everything you need in lecture but the book is a good supplement and reading it actually helped.

My boy Jacob is a legend. The tests were very similar to his practice exams (still difficult), the curve was FAT, and Jacob's lectures were entertaining. Anyone who got less than a flat B in this class (below the median) obviously was among the 150 or so people who skipped basically every lecture lol...

Second time retaking 109A, Serup had more difficult testing, but much more lenient on curves. He wants people to pass the class, and as long as you do the homework, ace the quizzes and have good attendance, he will do whatever he can so you pass the class. His tests are very difficult in terms of time, so practice working quickly so you can answer

Pretty hard class. Attending class, attending section, doing homework, and reading the textbook is required to get a good grade. I recommend going to office hours. Lecture was not mandatory but attending is recommended because he doesn't upload lecture slides until after the related homework is due. I learned a lot in this class however.

He's not the best lecturer, but he goes along with the textbook so you can easily catch up if you read. Work hard, do homework, and read the textbook. You can go to lecture but he is quite confusing and his handwriting is not legible so I honestly don't think it's mandatory.