Are you looking for the Spring 2025 Conference instead?

The 30^th Annual Spring Conference will be held March 13-14 at Santa Rosa Junior College in Santa Rosa, CA. Please join us at our Spring Conference.

The 2026 Spring Conference, our 30^th spring conference, will be held at Santa Rosa Junior College on March 13 and 14, 2026 in Santa Rosa, CA. The theme of the conference is "The Radius of Learning" as we celebrate holding the spring conference at one of our local community colleges on Pi Day.

Registration on Friday begins at 5:00 PM in the Lindley STEM Center (first floor). From 5:30–6:30 PM, Santa Rosa Junior College math faculty will host mathematical puzzle rooms — think escape room, but mathematical! A dessert reception will be available during this time. The Friday evening keynote and conference welcome will begin at 6:45 PM in Lindley 138.

On Saturday, registration opens at 8:15 AM. Be sure to attend the brief but informative welcome general session from 8:30AM-8:45AM in Lindley 138, where we'll share important details about the day’s events. Breakout Sessions 1 and 2 run from 9:00AM–11:30 AM. During Session 2, don’t miss the student poster contest in Lindley 138.

Lunch will be served starting at 11:45 AM in the cafeteria in Bertolini Hall, followed by awards and the Saturday Keynote in the Student Activities Center in the room next door beginning at 12:45PM.

In the afternoon, attendees may choose between Breakout Sessions 3 and 4 or visit the mathematical puzzle rooms in Lindley 211 and 221, open 2:30–5:00 PM.

Throughout the day, support the CMC³ Foundation by purchasing raffle tickets. The raffle drawing and closing remarks will take place at 5:00 PM on the first floor of Lindley near the Foundation booth.

All breakout sessions, puzzle rooms, exhibits, and activities will be in the Lindley STEM Center with the exception of lunch and the Saturday keynote talk, which will be held in the Bertolini building. Throughout the day on Saturday, don't forget to visit the vendors who will be exhibiting all day, and go to Lindley 138 to see the student's posters.

Information on conference registration and hotel reservations can be found below.

Call for Presiders

Would you like to preside at one of the talks at the Conference? If so, offer to do so.

Call for Student Posters

CMC³ invites community college mathematics students to participate in student poster session at our Spring conference. We encourage all types of posters that present some aspect of mathematics (math history, math education, problem solving, mathematical modeling, algebra, calculus, topology, statistics, etc), and provide guidelines for your poster and information on how they will be judged.

If you would you like to take part in the student poster session submit a proposal.

Conference Registration

Early-bird online registration is now closed. To register for the conference, please register on-site at the regular registration rate.

The registration rates are described below:

• PT/Contingent & Retired Faculty, Speakers (Current CMC3 member): $100
• Full-time Faculty (Current CMC3 member): $200
• Full-time Faculty (non-member): $260
• CMC^3 Annual Membership: $60
• PT/Contingent & Retired Faculty, Speakers (Current CMC3 member): $100

Hotel Reservations

Blocks of rooms have been reserved for conference attendees at the following hotels at the following rates:

Hyatt Regency Sonoma Wine Country (170 Railroad St, Santa Rosa, CA 95401)

• $239 per night (single rate and double rate)
• $264 per night (triple rate)
• $289 per night (quad rate)

Breakfast included in all reservation rates. The cut-off date for attendees to make their reservations is February 13, 2026 at 11:59pm.

Holiday Inn Express Santa Rosa North By IHG (2632 Cleveland Avenue, Santa Rosa, CA 95403)

• $123 per night + tax (single rate and double rate)

Breakfast included in all reservation rates.

Invitation to Exhibitors

CMC³ welcomes all vendors who want to set up a booth or purchase advertising space in the conference program. For information please email our business liason.

Campus Map and Parking Information

The map below shows attendees where to park on Friday and Saturday. If you park in the indicated lots, not only will you be in the closest lot to the conference buildings, but you also don't need to purchase a parking permit.

SANTA ROSA JUNIOR COLLEGE PARKING (Recommended to park in the SRJC Emeritus Parking Lot). This parking lot is closest to the Lindley Center for Education, which is where the conference sessions will be held.

The Lindley Center for Education will be used for the Friday dessert reception, Friday Keynote, conference breakout sessions, exhibits and activities.

Why does π come from circles, and not other shapes like polygons or ellipses? Why does the derivative of area equal perimeter for circles but not squares?  Exploring these questions leads to surprising insights into what "roundness" is — and is not — about.

Corey Shanbrom earned his PhD in Mathematics from UC Santa Cruz in 2013. Since then he has been a faculty member in the Department of Mathematics and Statistics at California State University, Sacramento, where he is currently Professor and Director of the Peer Assisted Learning program.

Through the ages, the ratio of the circumference of a circle to its diameter, which we call π, has fascinated mathematicians and non-mathematicians alike. In this presentation we will explore the history, the mysteries, and the controversies surrounding this famous number.

John was born and raised in Riverside California where he learned to dislike smog and congested freeways. After graduating from Humboldt State College with a BA in mathematics, he began teaching at Clark Junior High School in Glendale, California. He remained at Clark for two and a half years (aging 10 years during that time). He subsequently taught at Crescenta Valley High School for four years.  During that time he took classes at the University of Southern California and earned his MA in mathematics with the main goal of moving up on the salary schedule. He later realized that this qualified him for teaching at the junior college level and began looking for a place to settle down permanently. In the Fall of 1981 he was hired to teach full time in the mathematics department at Santa Rosa Junior College where he remains.

In 2010 John won the Poyla award for an article that he wrote on the cycloid for the College Mathematics Journal. He notes that this makes him a "one-hit-wonder" since he has no intention of ever writing another journal article.

John has spoken at numerous local, state, and national conferences. In addition to his wife, his family includes three daughters, a son, two sons-in-law, one daughter-in-law and eight grandchildren. He retired in 2018 in order to pursue his hobbies of teaching one or two classes each year and growing Pythagorean trees.

Future CMC³ Conferences

Information about future conferences is available. For additional conference information, contact the Conference Chair. For registration information contact the Membership Chair