Foreword

“If someone calls formula sheets too much, if they call clarity and care “unprofessional,” then what does that say about what they think education is for? Because if education isn’t for our students, then who is it for?”

— Ivan Z. Feng, “Formula Sheets, We Miss You”

Table of Contents

Page Overview How to Address Me
Email Responding Asking Questions
Inclusive Expression Discussion Attendance
Ivan’s Office Hours Office-Hour Locations
Recommended Resources Past Courses

Page Overview: I’ve provided all the information you might need about our discussions on this page, aiming to save you the time of asking questions I should have made clear to you. (But that doesn’t mean you can’t ask me things that can be found on that page; you are still very welcome to ask me anytime!)

How to Address Me: Ivan. There’s no need to call me “Mr. Feng” or “Professor Feng.” Of course, I’d never correct how you address me, as I respect your right to call me whatever you want, but, as a personal preference, “Ivan” is what I’d prefer to hear from anyone.

Email RespondingWhenever you have any math questions or comments, email me anytime at ifeng@usc.edu. For all emails received by 10 pm each day, I’ll be sure to respond within the same day (usually pretty soon, ASAP). For all emails received between 10 pm and 11:59 pm each day, I’ll be sure to respond by the next noon.

Asking Questions: As your TA, I’m your assistant and guide in this course, not a judge. I’ll do my best to help, not to evaluate your questions. To me, there are no “silly” questions; every question is a great question. If my explanations aren’t clear during office hours or by email, that’s on me, not you!

Remember, Isaac Newton asked himself a super silly and childish question in the summer of 1666: Why would an apple fall down instead of falling upwards or sideways? But that childish question finally led him to the discovery of universal gravitation. Thus, you are always welcome to ask everything in your mind, no matter whether the answer can be found on the board or in previous lecture notes. And I’d be very happy to answer anything you ask.

Or if you prefer to work independently and rely on yourself, it’s also great. There’s no single way to find answers to your questions. But, I’m asking you to preserve your curiosity well and never let it go.

Inclusive Expression: Feel free to ask questions and make comments directly, or raise your hand if that’s more comfortable for you – both ways are perfectly respected. Your insights and comments are highly valued. Expressing yourself openly contributes to a diverse and dynamic learning environment, enriching the experience for all.

Discussion Attendance: Just like a theater offers something a home stream can’t, being present in discussion creates a collaborative learning experience that is hard to replace. So regular attendance is important. If you have a conflict and can’t attend in person, I’d appreciate you letting me know in advance so we can plan accordingly.

Ivan’s Office Hours*:

  • Tuesday: 11 am-12 pm
  • Wednesday: 2-3 pm, 4-5 pm

*You are always welcome to attend my office hours. This is my designated time to assist students, so please don’t feel hesitant—it’s what I’m here for. I’ll be waiting for you in the math center. If my hours don’t fit your schedule, feel free to schedule an appointment with me outside of my regular office hours. We can either do it in the Math Center physically or in my personal zoom room online. Send me an email so we can set up a time, and then I’ll send you my zoom link. You can find my weekly schedule here to check my availability.

Office-Hour Locations:

Math Center [KAP 263] and Zoom*

*If you want to join my office hours by Zoom, click here. The Math Center Assistant on duty will assign you to my breakout room.

Note I: As a rule of the Math Center, TAs are there for *all* students (not just their own students) when holding office hours. So you can go there anytime to do homework or get help from any TAs. And I will surely be there at least during my office hours. You can check out here the Math Center Schedules including all TAs’ office hours this semester.

Note II: The Math Center is run on a drop-in basis without appointments. Thus, if many students show up during my office hours, I’ll try to let you ask one question at a time in order of arrival (unless you have to leave soon) and then continue the cycle, to ensure everyone there has a chance to discuss questions with me instead of waiting for nothing. Feel free to give me any feedback!

Recommended Resources:

 

Teaching Pages for Past Courses:

Math 540a, 555a (Fall 2025)

Math 125 (Fall 2024)

Math 225 (Spring 2024)

Math 226 (Fall 2023)

Math 118 (Summer 2023)

Math 129 (Spring 2023)

Math 125 (Fall 2022)

Math 225 (Spring 2022)

Math 118 (Fall 2021)

Ivan’s Medium Articles on Math Teaching

Afterword

“Our hearts an ocean, vast and deep, we bear,
A love for all, their burdens, we must share.
Each soul we nurture, with a tender hand,
In learning’s halls, united, we shall stand.”

— Ivan Z. Feng, “Thoughts on What Good Math TAs Should Be Like”

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