Mathematics

Faculty

Email: mbautista@pausd.org

Michael Bautista is a Bay Area native and holds degrees from Stanford University, the San Francisco Conservatory of Music, and National University.  He is passionate about helping students develop mathematical curiosity, computational thinking skills, and a growth mindset. Michael loves to use strategies that target different modes of learning, especially by using music to help teach math. During the summers, Michael serves as a coach for Ignited, a company that connects teachers with cutting-edge summer fellowships in industry.  Outside of school, Michael enjoys spending time with his wife and daughter, and loves to compose music.

Email: cbell@pausd.org

Chris has worked at Gunn High School since 2007, working in the Math, Computer Science, and Focus on Success departments.  He has received degrees from UC Davis and NDNU, and is a big believer in always continuing to learn - which is why he also attends multiple classes a year.  Chris is passionate about teaching students and teachers how to use technology effectively in learning.  Him and his wife also love attending student performances on campus and seeing how talented Gunn students are in a wide range of activities. 

Email: rcongress@pausd.org

Rachel Congress has worked at Gunn for over 10 years.  She has a Bachelor’s degree in Psychology with a Minor in Studio Art from Scripps College.  She worked at Gunn as a Special Education Aide for three years before taking a leave to obtain a Bachelor’s degree in Mathematics from CSUEB and a teaching credential from Notre Dame de Namur University.  Rachel began teaching Math at Gunn in 2007.  She was a facilitator at Camp Everytown for eight conferences, served on the WASC Leadership Team, and is currently an Intervention Teacher on Special Assignment (TOSA) for 40% of her teaching assignment.  In her spare time, Rachel enjoys skiing, reading, swimming, playing the piano, traveling, and going to Giants games

Email: ddeggeller@pausd.org

has been teaching Mathematics at Gunn since 1996.  He is a graduate of Palo Alto High School (1989) and Rice University where he earned his Bachelor’s in Economics (1993) and his Master’s in Math Education (1995).  In 2009, Dave was Nationally Board certified in secondary mathematics.  He has taught all levels of math at Gunn from Algebra 1 to BC Calculus and was awarded the Principal’s Cup in honor of his commitment to student learning and his many contributions as a faculty member at Gunn High School.  In his spare time you might find him playing with his two children, hamming it up in the student staff musical, or composing offbeat songs on guitar and piano.

Email: rdion@pausd.org

first began teaching at Gunn in 1999 and taught here for 6 years.  After staying home with her children for a few years Rachel is excited to return to Gunn to teach one class.  Prior to Gunn, she also taught math and chemistry for six years in Canada.  Rachel earned her math degree from Trent University and Education degree from Queen’s University in Canada.  In her free time Rachel loves to hike and spend time with family and friends.

Email: ccismas@pausd.org

Cristina Florea began teaching at Gunn in 2006, after teaching at Saratoga High School.  She earned her Bachelor Degrees in Mathematics and Marketing, teaching credential, and Master Degree in Education Technology from Santa Clara University.  Cristina also completed coursework at Wharton and received a certificate to teach business to high school students, and now gives seminars at Wharton in applied learning.  She started BEAM, a program that teaches students how mathematics applies in real world contexts through business applications.  Partnered with the City of Palo Alto, Ernst&Young, PricewaterhouseCoopers, The Design Farm, and Silicon Valley Talent Partnership, BEAM gives students the opportunity to give back to the community and obtain hands-on experience in fields such as finance and quantitative marketing through volunteer work for local small businesses and non-profit organizations.  In BEAM, students are also encouraged to start their own business and receive mentorship from private sector firms and business school alumni.  In her free time, Cristina enjoys ballroom dancing, cooking, traveling, and spending time with her family and friends

Email: dgleason@pausd.org

received her teaching credential from San Jose State University. She is credentialed in both mathematics and business. Before teaching at Gunn, she taught at Gunderson High School in San Jose. As a Cubberley graduate, she was happy to be return to Palo Alto and the PAUSD.  In 2009, Diane received her National Board Certification in secondary mathematics. Outside of the classroom, Diane likes to backpack, ski, and horseback ride.

Email: dhahn@pausd.org

grew up in southern California and studied Chemical Engineering at the University of Pennsylvania. After graduating in 2003, he got a job teaching math and fell in love with the profession. In 2006 he returned to Penn. where he earned a Master's degree in education. Danny received a Knowles Science Teaching Foundation fellowship in 2006 and an Industry Initiatives for Science and Math Education fellowship in 2010. He is a huge fan of the annual Choir/Staff musical.

Email: pherreshoff@pausd.org
Email: jhexsel@pausd.org

started working at Gunn in 2011 as an instructional aide for the Focus on Success and Independent Studies programs. After completing her student teaching at Gunn, she was very happy to join the Mathematics Department as a fully credentialed teacher. Jessica earned her Bachelor's degree in Mathematics at California University of Pennsylvania and completed her teaching credential at Notre Dame de Namur University. Formerly working in educational technology research at Carnegie Mellon University, Jessica hopes to share her passion for math and technology with all of her classes.

Email: mjamison@pausd.org

Marcus Jamison graduated from the Stanford Teacher Education Program, earning a Master’s of Arts and CA Teaching Credential in Mathematical Education. He earned his Bachelor’s of Arts at Stanford University in Urban Studies, writing a senior capstone on how school could influence social change in the community. He also received a minor in Civil Engineering with a concentration in architecture. In 2013, Marcus went straight into the teaching profession and has joined the Gunn teaching staff in Fall 2016. Marcus is Sophomore Class Advisor and passionate about global travel and globalization, critical thinking, technology, public speaking and cycling.

Email: tkaneko@pausd.org

Takeshi Kaneko graduated from Harvey Mudd College with a BS in Engineering and All-America honors for swimming.  After a brief stint as a software engineer, he traveled with a professional golf mini-tour as its Publicity Director.  He then returned to California and earned an MA in Education from UC Santa Cruz.  After spending eight years at Harbor High School in Santa Cruz teaching mathematics and computer science, as well as coaching the girls' water polo and swimming programs, he took a year sabbatical to travel around the world.  At Gunn, Takeshi serves as advisor for the Engineering Club.  In his spare time, he enjoys swimming and playing water polo, ice hockey, and golf.

Email: ckaras@pausd.org

For over 30 years, Chris Karas has taught high school math of all levels from Pre-Algebra to BC Calculus. He also taught calculus and pre-calculus for UC, Berkeley Extension Program for several years. Chris has a Bachelor’s Degree in Mathematics from the UC Berkeley and received a Secondary Teaching Credential and a Master’s Degree in Education from San Francisco State University. He enjoys participating in the staff-student airbands, the staff-student musical, the Clash of the Titans, and the staff softball game. In his spare time Chris enjoys playing softball, basketball, soccer, and jogging. He has completed several full and half marathons.

Email: cmartinez@pausd.org

Carlos started teaching at Gunn in Fall 2016 after moving to Palo Alto from the city of Santa Ana in Orange County, southern California. In Santa Ana, Carlos taught Algebra 1 and Algebra 2 Honors, & assistant coached Swimming for two seasons at Segerstrom High School. Carlos has two Bachelor’s degrees in Economics and International Studies from the University of California, Irvine (UCI), and completed his credential program at California State University, Long Beach (CSULB). What drew Carlos to Gunn was how much the Titan community values the well-being of the whole student, including emotional well-being. When Carlos is not in the classroom, you can usually spot him practicing yoga/ acro-yoga, swimming laps, rock climbing, and watching his students compete at Gunn sporting events. Carlos looks forward to possibly coaching swim and assisting the yoga program offered to students and staff at Gunn.

Email: jpaley@pausd.org

is a Computer Science and Mathematics teacher who believes that a year of Computer Science should be a graduation requirement for all high school students. He is a member of the CSTA Leadership Cohort, a national group of teachers who effect change and promote CS education. Josh received the NCWIT Aspirations Award for Educators for his work in encouraging young women to do computing. He is excited to partner with UC-Berkeley on http://inst.eecs.berkeley.edu/~cs10/ as well as Google's CAPE program. Josh won a national fantasy baseball contest in Y2K and occasionally writes articles on baseball, for example Ron Shandler's Baseball Forecaster 2011. Josh is an avid indoorsman as he is allergic to things such as plants, dirt, and probably fresh air. He enjoys board games and poker and is a ferocious Boggle player.

Email: epinkston@pausd.org

Emily starting teaching at Gunn in 2016-17 after moving to California from Kansas. In Kansas, Emily taught Algebra 1 and Algebra 2. Emily has a Bachelor’s degree in Mathematics from the University of Kansas and a Master’s degree in Special Education. Even though Emily has only lived in California for a short time, she already loves the community and is enjoying the relationships she has made with the Gunn students and staff. In her free time, you might find Emily watching KU football or basketball, swing dancing, reading, going to the farmer’s market or spending time with her friends and family.

Email: credfield@pausd.org

has been teaching math at Gunn for 10 years. Before becoming a math teacher Chris worked in technology and consumer products, with Silicon Graphics, Macromedia, and Dole Food Company. One of his goals as a teacher is to make high school math more relevant to students by making connections to real-world applications. Chris earned a BSE from Princeton University and a MS from the Massachusetts Institute of Technology. In addition to being a math teacher, Chris has been coach of the golf team for 10 years and coached boys basketball for his first 9 years at Gunn.

Email: drenazco@pausd.org

With more than 13 years of teaching experience, Daisy Renazco loves her chosen profession. As a teacher, she has the opportunity to have conversations with students that can lead to a change in how students accept one another. She is the teacher advisor for the Gay-Straight Alliance (GSA), and has received awards from Gunn High School and Project Outlet on her leadership in creating a safe school for all students through our Not In Our Schools week. Daisy earned her degrees from Saint Mary’s College of California and San Jose State University. In her free time she enjoys anything that lets her to be outside, spending time with friends and family.
Ms. Renazco's Website

Name: Karen Saxena
Email: ksaxena@pausd.org

Karen holds a Masters in Education and Teaching credential in Mathematics. She also has a bachelors’ in Math, Physics from Bates College and Electrical Engineering from Washington University in St. Louis. She worked as a programmer for an educational software company for over 10 years before going back for her Masters. In addition to teaching, she has been coaching middle school athletics for over 10 years. In her free time, she likes to run, bike, walk, do puzzles, read (mysteries and history), and sew.

Name: Toni Smith
Email: tsmith@pausd.org

Toni Smith has taught secondary mathematics for more than 20 years.  She received her Bachelor’s degree in Mathematics and Master’s degree in Computers and Educational Technology from California State University, San Bernardino and her post-graduate studies from University of San Diego.  Prior to teaching mathematics at Henry M. Gunn High School, Toni taught at Rim of the World High School in Lake Arrowhead, California. Toni enjoys inspiring students and making mathematics relevant by connecting core concepts to reality.  Toni is the adviser for the Gunn Business Club, which combines both Future Business Leaders of America and DECA Clubs.  Toni serves as elected Teacher Representative for Gunn’s School Site Council and co-sponsors the Gunn ReCYCLEd Bike Program, which gives bicycles to any student in need of transportation.  Outside of School, Toni loves spending time with her husband and four children.   

Name: Emily Yun
Email: eyun@pausd.org

holds a Masters Degree in Education and a Teaching credential in mathematics. She has been teaching mathematics in California public high schools since 2005, and started teaching at Gunn High School in 2013. In addition to mathematics, Emily taught English as a Second Language (ESL) in Japan for 3 years. She also has experience teaching SAT prep courses. When not teaching, Emily enjoys spending her time hiking, salsa dancing, jogging, watching ballet and opera, and traveling all over the world.