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Diamond Ring Effect Wide.jpeg
  The Diamond Ring Effect, Solar Eclipse of August 21, 2017, by Max Goldstein, Wilson High School Class of 2019


As of May 10, 2022 my tutoring schedule is full. Please see separate page titled "Other Tutors." If you want to be on my waiting list, email me.

I have been tutoring off-and-on, mostly on, since 1978. I began as a junior at Columbia High School and tutored math and science at Mt. Hood Community College. I developed a unique peer-tutoring program in the physics department at the Massachusetts Institute of Technology, for which I won the prestigious Polaroid Award. I believe in the power of one-on-one and small group tutoring.

For the present, I am going to focus on the following:

  • 9th Grade NGSS Patterns Physics

    • Note: I am happy to form an "Advanced 9th Grade Physics Group" for ​students who are doing fine in the class, but hunger for more physics!

  • 10th Grade NGSS Patterns Chemistry

    • While I am much more a physicist than a chemist, I taught this course at IBWHS for a couple years and got pretty pumped up about chemistry. ​

  • GED

    • I think the GED is a fine route for all kinds of students​ from those who are struggling in high school academically, emotionally, and/or socially, to those who are doing great in high school, but just want to get their GED and do something that fills their souls a bit more. 

  • Math​

    • There are several other excellent tutors ​taking math students in Algebra 3-4, precalculus, and calculus. Send me an email for more info. If you are looking for Algebra 1-2, Geometry, or other basic math, let me know. I love to tutor advanced math, if the other tutors are full, I will take care of you.

  • I am open to tutoring other physical science and math classes in the future. Let me know what your needs and interests are.


I meet students on

  • Tuesdays, 4:00 - 7:00 pm

  • Sundays Noon - 8:30 pm

I meet students at my office:

  • 7912 SW 35th Avenue, Suite #3, Portland OR 97219-2427.

  • That is above Marcos Restaurant in the historic Nelson Thomas Building, Multnomah Village.

  • Students need to be fully vaccinated and boosted against Covid-19.

  • We will wear medical grade masks.

  • As weather allows we will meet outside on the balcony, meet inside with a window open, or at least have an air purifier in operation.

  • Parents are always welcome. Parents need to follow same Covid-19 protocols.

  • I am open to Zoom tutoring as needed.

If you or your student needs some help with any of these classes, send me an email by clicking the email address at the bottom of this page. Tell me:

  • The name of the student, contact information, class name, school, teacher.

  • Whether you prefer an individual or small group setting. Groups can be formed by clients or by me. Talk to me, we will figure it out.

  • Your preferred day and time.

TUTORING RATES for classes other than AP, IB, College

1 student = $75/hour

2 students = $100/hour = $50/hour each

3 students = $120/hour = $40/hour each

4 students = $140/hour = $35/hour each

more than 4 students =    $30/hour each

TUTORING RATES for AP, IB, College, and other Advanced Courses

1 student = $90/hour

2 students = $120/hour = $60/hour each

3 students = $150/hour = $50/hour each

4 students = $180/hour = $45/hour each

more than 4 students =    $40/hour each


See the "About" page for a resume and references.


Anyone who is a descendent of slaves in the US in the last 500 years receives a 50% discount. This is part of my contribution to reparations for US slavery.

Anyone who is a Native American of the Cascade Bioregion receives a 50% discount. This is part of my contribution to reparations for the US stealing native land.

Anyone who cannot afford my rates is welcome to apply for a partial fee-waiver. If your family income is the same as mine or more, you need to pay full price (except for the two discounts above). If your income is one-half of mine, you pay half-price. If your family income is one-quarter of mine, you pay one-quarter-price. My current gross family income for a family of 3 is about $70,000. 

All discounts are strictly honor system. I believe strongly in the basic decency of humankind.

Anyone who earns more than me is welcome and encouraged to support my efforts to provide high quality tutoring to anyone who desires it by making a donation. Coriolis is a sole-proprietorship for-profit business owned by me. Donations to Coriolis or me are not tax deductible.

If you would like to support my work in general but prefer to make a tax-deductible donation, please do one of the following:

  • Support my youth astronomy education work with the public at-large through the Rose City Astronomers by sending an email to

  • Support the Ida B. Wells High School (SW Portland) Astronomy Club at this link

  • Support my physical science teaching at Ida B. Wells High School (SW Portland) at this link

All of these are fully tax-deductible. If you make a donation to one of these, please also send me an email with your name and the amount so I can make sure the donation is properly accounted for and you are appreciated appropriately.