Our full-time educators are recent college graduates who have mastered the skills students need to succeed and are well versed with Sage’s methods, curriculum, and culture, in order to provide your students with the best tutoring experience available in the Bay Area. Having recently graduated themselves, our educators offer students help from adults they can relate to (not adults they are related to).

William Heaps, Sage Founder and Educator 

Sage Educators Founder William Heaps graduated from Virginia Tech University with degrees in political science, international politics, and Spanish. While completing his coursework, he coached soccer, swimming, and basketball teams and served as an athletic camp director. He also studied abroad at Universidad de San Francisco de Quito, Ecuador. William then studied history at the University of Amsterdam, earning him master’s degree summa cum laude. Back in the U.S., he became director of a prominent Washington, D.C. tutoring and test-prep company, where he was an SAT and ACT instructor, academic tutor, and homeschool teacher. While teaching subjects from American history and government to trigonometry and AP calculus, he also trained new instructors and implemented an innovative online tutoring program. William and his wife, Jaime, have been part of the Mill Valley community since 2007. Recognizing a need for customized tutoring and test prep services, Jaime and William founded Sage Educators. Along with serving as Sage’s director, William specializes in math, science, and history tutoring. When not at Sage, he enjoys hiking, traveling, and volunteering as a mentor for a Bay Area youth organization.

Jaime Heaps, Sage Founder and Executive Director

Sage Educators Founder Jaime Heaps graduated from Virginia Tech with a B.A. degree in world politics and policy, French, and political science. As an undergraduate, she studied abroad at the prestigious American University of Paris and the Sorbonne. She went on to earn a master’s degree in history from the University of Amsterdam. Following her education, Jaime accepted a position in one of the top public school systems in the U.S. As a key member of the district’s Special Education team, she coordinated Individualized Education Plans and 504 Plans for students with special needs. Jaime and her husband, William, have been part of the Mill Valley community since 2007, when they moved here from Washington, D.C. Recognizing a need for customized tutoring and test-prep services, Jaime and William founded Sage Educators. Along with serving as Sage’s director, Jaime specializes in test prep, organization, and study skills. When not at Sage, Jaime can be found cooking, reading, hiking, and traveling wherever she can, from France to Ecuador.

Rachel, Senior Director

Rachel Byron graduated magna cum laude from Miami University, where she earned her B.S. in Exercise Science. Rachel’s dedication to education earned her President’s List and Dean’s List distinctions at Miami and enabled her to participate in the Golden Key National Honor Society, a selective organization for high-achieving college students. Like her twin sister, fellow Sage tutor Jessica, Rachel played four years of NCAA Division I soccer on the Miami University Women’s Soccer Team. During her tenure at Miami, Rachel learned to successfully balance the demands of academics and college athletics as demonstrated by her selection to the 2010 and 2009 Academic All Mid-American Conference Team and recipient of the Mid-American Conference Commissioner’s Award for Academic and Athletic Excellence. Rachel was born in Elkhart, IN, and has been very fortunate to travel to some amazing places. Her experiences have led her to develop a strong passion for empowering youth. She is excited about the opportunity to help kids realize their potential and is especially thrilled to be a member of the Sage team. While Rachel is not pursuing her passion for youth development, she can be found running, reading, and taking advantage of the beautiful Bay Area that she is happy to call home.

Aaron, Educator

Aaron Batker Pritzker graduated from Harvey Mudd College with a bachelor’s degree in physics, and continued in physics to the University of Wisconsin-Madison for part of a Ph.D. program, before deciding his more fundamental questions lay in philosophy. He then completed a master’s degree in philosophy at San Francisco State University. He’s worked in physics to improve the efficiency of thin-film solar cells, test a new explanation for how the conductivity of a magnet changes next to a heavy metal, and simulate noise patterns in quantum computing hardware. In philosophy, his project has been to tell a story about which kinds of entities make up thoughts, feelings, emotions, and sensations, just like physicists tell a very compelling story about which kinds of entities make up everything else. Throughout his education, he’s been teaching and tutoring; his favorite part of this area of his life is discovering the way that each student learns so he can strengthen their particular skillset.

Kelly, Educator

Kelly Loutfi graduated from the University of Texas at Austin with a major in Biochemistry, a minor in Business, and Certificate in Spanish for Health Care Professions. Following her undergraduate work, Kelly worked with kids on the spectrum to learn behaviors that significantly improved their quality of life. Shortly after, she worked as a medical assistant at a fertility clinic where she was involved in direct patient care to help individuals achieve their dream of having a family or be proactive about their health. While in San Francisco, Kelly has tutored multiple students from different areas and backgrounds, primarily in math and science. She loves working one-on-one with adolescents, and is dedicated to turning students’ challenges into success stories. When she is not tutoring, Kelly can be found running on Crissy Field, taking her dog to the park, thrift shopping, and rewatching Gossip Girl.

Kelsey, Educator

Kelsey Lytle graduated from California State University, Chico with a Bachelor’s Degree in Theatre Arts specializing in scenic painting and is currently working towards a Masters Degree in Counseling. She has five years of teaching experience in multiple environments and enjoys working with students one on one, incorporating their individual learning styles. She is excited to continue teaching as a part of the Sage team. Outside of academics she enjoys reading, crafting, dance and attending live performances.

Sean, Educator

Sean Lytle graduated with his bachelors from California State University, Chico and a Master’s from California Polytechnic State University, San Luis Obispo in Quantitative Economics. He has worked as a tutor for several years before coming to sage. Beyond the world of academia, Sean’s interests are as diverse as his educational background. He loves reading, writing, movies, philosophy, video games, and pretty much anything else. He hopes to continue teaching for the foreseeable future.

Demetri, Educator

Demetri Voutselas holds a BS in Mathematics with a specialized focus on Data Science and a minor in Statistics from UC Irvine (2023). He actively tutored high school and college students in algebra, statistics, and calculus for three years during his undergrad. He is starting on an online Master’s of Science in Computer Science this spring, with a keen interest in machine learning. Beyond academics, he enjoys being active with a passion for soccer, basketball, and snowboarding. Fueled by a love for mathematics, Demetri is dedicated to teaching young adults the beauty of math and statistics.

Wallace, Educator

Wallace Morgan graduated Summa Cum Laude from the University of Georgia, where she earned her B.A. in Journalism with a certificate in Music Business. During her time at UGA, she was awarded the McGill Fellowship and the Terry Excellence Award, and further enriched her studies through a summer abroad at Oxford University in England. She went on to build a decade-long career in the entertainment industry before shifting her focus to education and counseling. Wallace has mentored students through 826LA and currently volunteers at Halleck Creek Ranch, supporting adaptive riding for children and adults with disabilities. She is pursuing her Master’s in Counseling Psychology at the University of San Francisco with plans to become a licensed marriage and family therapist. A published writer and performing artist, Wallace especially enjoys helping high school students craft standout college essays and fostering confidence through creative, individualized learning. Outside of tutoring, she loves hiking in Marin with her husband and dog, Binny, and spending time with their two cats, Phoebe and Flea.

Elizabeth, Educator

Elizabeth Shelton graduated from the University of California, Santa Barbara with a bachelor’s degree in Economics & Accounting and a minor in Mathematics. During her time as an undergraduate, she worked as a tutor and teaching assistant for the economics department, supporting a variety of economics and statistics courses. Her tutoring experience stretches back to the beginning of high school, when she began mentoring peers and younger students in a variety of subjects, primarily math and science related. By the end of high school, she was also mentoring aspiring tutors in launching their own tutoring ventures. Since then, Elizabeth has developed a passion for helping students build confidence and find clarity in subjects that are often seen as intimidating. She takes a collaborative approach that helps students feel supported and understood, while breaking down complex ideas into more accessible and manageable steps. When she’s not tutoring, Elizabeth enjoys exploring new technologies, playing puzzle and strategy games, working on creative craft projects, and spending time outdoors with her dog, Creampuff.

Bella, Educator

Bella Marinelli earned her Bachelor of Science in Marine Sciences with a minor in Zoology from the University of Florida. During her undergraduate studies, she conducted research on marine invertebrates in a university laboratory. After graduating, Bella built extensive experience in environmental education, working with students of all ages to explore science and the natural world. In addition to tutoring, Bella coaches volleyball at Tamalpais High School and with Marin Volleyball Club. Her academic background and hands-on teaching experience have shaped her passion for working with students and supporting their growth across a range of subjects. Outside the classroom, Bella loves staying active, whether she’s playing sports, hiking, or diving into a good book.

Will, Educator

Will Threlkeld graduated from the University of Colorado Boulder with a Bachelor’s Degree in Political Science and minors in Economics and History. He has experience tutoring undergraduate students in a variety of subjects, with a focus on economics and mathematics, and enjoys working one-on-one to match each student’s individual learning style. He is excited to continue teaching as a part of the Sage team. Outside of academics, he enjoys hiking, listening to indie and alternative rock, reading, and discussing history, politics, watches, and current world events.

Allyson, Educator

Allyson Baker graduated from the University of California, Santa Barbara with a double-major in English and French and a specialization in Literature and the Mind. While at UCSB, she completed a year-long research internship in the English Department as well as a cross-cultural research fellowship in the Arnhold Undergraduate Research Program. During her senior year, she studied in Paris at Sorbonne Université where she completed a cross-disciplinary research internship under the Director of the National Center of Scientific Research. Her research (in both French and English) explores the relationships between literature, culture, and psychology. In addition to several years of tutoring experience, she also works as a resident counselor for middle school students at UCLA during the summer. In her free time, she is working on a science-fiction novel, loves hiking, and enjoys making matcha lattes.