Meet Our Faculty

Cassia Lee designs student-centered music lessons that integrate instruments, movement, and cross-disciplinary learning across all skill levels of piano, voice, and music theory.

Ms. Lee holds a Master of Music in Vocal Performance from Temple University and a Bachelor of Music in Voice from Ewha Womans University in Seoul, Korea. She received her early musical training as a voice major at Kaywon High School of Arts in Korea. She has extensive experience teaching general music to students in K–8, as well as music history and theory to Upper School students and group piano labs.

Ms. Lee is an accomplished musician and classical vocalist who plays piano, organ, recorder (soprano and alto), kalimba, ocarina, ukulele, and various Orff instruments. She currently serves as Choir Director at Emmanuel Presbyterian Church, where she previously served as a soloist. She has also performed as a classical vocalist in numerous concerts, recitals, and choral performances, as well as with New Jersey Chamber Orchestra, Delaware Valley Opera Company, Libera Opera Company, and Temple Opera.

Drawing on her experience as both an educator and professional performer, Ms. Lee brings a broad range of musical experiences into the classroom and is passionate about creating engaging, meaningful, and accessible musical experiences for students.

Mary Lyon brings wonder and curiosity to her work, cultivating a classroom where students learn that failure is a necessary step on the road to success and understanding. She inspires personal exploration in her students to better cultivate their active young minds and enjoys creating cross-curricular lessons that incorporate peer-to-peer collaboration.

Ms. Lyon holds a M.A. degree in Theatre Arts from Villanova University and a B.A. in Theatre and Education from Allegheny College. Her experience ranges from teaching kindergarten to college and includes theatre work overseas, most recently in Ireland. In addition to acting and directing, Ms. Lyon also loves being behind the scenes and brings experience as a props manager, lead technician, and assistant master electrician to her classes and our annual theatrical productions.

Alexis Miller is our own Polymatheia, inspiring the mathematical, language, and intellectual curiosity of her students. Her engaging and experiential approach through increasing levels of Mathematics ranges from crochet, to trebuchets, to 3-D and predictive modeling technology.

Alexis Miller holds a B.S. in Education from West Chester University and is a member of Kappa Delta Pi, an international honor society in Education. Prior to Grayson, her classroom and teaching experience included the development and delivery of 1:1, differentiated lessons and assessments for students.

Colin Pigeon brings expertise in Java and Python coding, robotics, data structures, and algorithms to his Computer Science classes at Grayson, inspiring his 4th-12th grade students to develop strong problem-solving skills and a deep understanding of technology.

Mr. Pigeon earned his B.S. in computer science with a certificate in computer security from West Chester University. Prior to joining Grayson, he taught Middle and Upper School computer science classes and coached robotics at Germantown Friends School, and previously taught computer science, led student clubs, and tutored math at Saddle River Day School in New Jersey. Mr. Pigeon is dedicated to making computer science accessible to everyone and nurturing a love for all things in the field, from hands-on robotics to complex programming.

Dr. Luther Rinehart shares his passion for mathematics and promotes independent thinking and an understanding of concepts, beyond merely memorizing facts in his classrooms.

Dr. Rinehart obtained his B.A. in Mathematics from the University of Chicago, and his M.S. in Physics from the University of Pittsburgh. In August of 2022, he earned a Ph.D. in Mathematics from Texas A&M University, where his advisor was Dr. Stephen A. Fulling, whose work led to the discovery of the hypothetical Unruh effect. Dr. Rinehart’s research interests include classical field theory, quantum field theory, algebraic quantum mechanics, symplectic geometry, and applications of differential geometry and functional analysis. He is the author of Modern Mathematics – A Handbook of Definitions and Theorems.

Dr. Rinehart is also passionate about music, having graduated from the American Boychoir School in 2005, and has sung with the Schola Cantorum of Gettysburg, the University of Chicago Early Music Ensemble, and the Pittsburgh Compline Choir. He is interested in Renaissance and Baroque music and plays the violin and treble viol.

Miranda Rossi is an empathetic school counselor who brings experience from both school and clinical environments.

Jared Scheetz is an enthusiastic instructor whose pedagogy centers on finding and developing intrinsic motivation in his students. Through his general music classes and private lessons to co-directing our annual musical theater productions and directing jazz and instrumental ensembles, every student at Grayson benefits from his broad musical interests and talents.

Mr. Scheetz holds a M.Mus. in Music Theory and Composition, which he earned with summa cum laude honors from West Chester University’s Wells School of Music. For his master’s thesis, Jared wrote a musical based on the lives of female pirates Anne Bonny and Mary Read. He also holds an undergraduate B.M. degree in Music Education with instrumental concentrations in Classical Guitar and Double Bass from West Chester University’s College of Visual and Performing Arts. Trained in both the Kodály and Orff-Schülwerk teaching methodologies, he plays piano and guitar primarily, and likes to collect and play an eclectic variety of instruments. He has taught classes on a wide variety of topics to spark students’ connections to music, including African drumming, blues composition, analyzing a Beethoven symphony, film scoring, electronic dance music composition, and the history of Rock and Roll, just to name a few. He believes in the importance of teaching both traditional classical repertoire and more contemporary styles.

Mr. Scheetz is an experienced teacher and performer, who also shares his extensive woodworking and construction experience with the Upper School students he mentors in their Open Studio projects.

Dr. Ryan Seaberg’s own linguistic pursuits are an excellent model for how students can channel and immerse themselves in an intellectual passion, as he has mastered a truly remarkable repertoire of languages: in addition to Greek and Latin, he knows French, German, Old Norse, Middle High German, Gothic, Old Saxon, Middle Dutch, Czech, and Portuguese.

Dr. Seaberg defended in December 2019 and received his Ph.D. in Classical and Near Eastern Studies with a minor in Germanic Studies from the University of Minnesota. His doctoral research, “Lexical Blends in Greek and Latin Comedic Idiom” deals broadly with linguistics and lexicology in Greek and Latin comedy. He holds both a M.A. degree and a B.A. degree in Classics from the University of Iowa where he also taught. Prior to joining The Grayson School, Dr. Seaberg taught Latin and Classical Greek at the University of Minnesota, and a term as a guest researcher at the University of Freiberg in Germany.

Additionally, Dr. Seaburg is a published author whose scholarly work on the Greek comic playwright Cratinus offers a translation and commentary on 205 of the author’s 514 known fragments and dubia. He has presented professionally at a Classics conference in Murano, Italy.

Dr. Seaberg feels that gifted students deserve, and benefit from, the challenges presented by classical languages, which are complex and detailed.

Megh Shah combines technical expertise, data-driven strategy, and a strong passion for student engagement to foster organized and supportive learning environments at The Grayson School.

Mr. Shah earned his B.S. in Business Administration with a major in Business Analytics and a minor in Operations Management from Widener University, where he was a Widener Presidential Scholar. Prior to joining the Grayson team, he implemented individualized education plans (IEPs), facilitated social-emotional learning, and provided differentiated instruction as a special education professional and substitute teacher. His background also includes experience as an Integrations Developer at NFI Inc., where he designed data integration solutions and optimized technology systems.

Mr. Shah is dedicated to utilizing educational technology, student-centered support, and collaborative problem-solving to help Grayson students thrive.

Michael Sizer’s pedagogy places emphasis on the use of demonstrations and hands-on work in his lab because he knows that experiential learning is a highly dynamic and engaging way to impart learning and convey the real-world applications of the science he teaches.

Mr. Sizer holds an undergraduate B.S. degree in Biology from Ursinus College, with additional study in pedagogy at Drexel University. His teaching experience includes years of instruction across multiple disciplines in science and mathematics, including engineering and algebra in addition to biology and chemistry. At his previous position with a small private school, he was also very involved with student extracurricular activities, coaching both the cross country and track teams, both of which he created and developed for the school.

Joshua Stitzinger is an intuitive educator who adapts his teaching methods to various learning styles and integrates clear expectations, humor, and positive reinforcement in his projects-based classroom.

Mr. Stitzinger earned his M.A. in Teaching & Learning and Technology Integration from Nova Southeastern University in Ft. Lauderdale, and holds a B.S. in Elementary Education and Fine Arts from Kutztown University. He joins Grayson from the French International School of Philadelphia where he was an educator, Board member, coach and mentor for student teachers, and led all after-school programming,

Mr. Stitzinger is an award-winning educator who has also taught at the Summer Institute for the Gifted (SIG).

Dr. Colin Tinsman’s experience in teaching physics, astronomy, and mathematics at the college level makes him especially well-prepared to engage our students and feed their many scientific passions.

Dr. Tinsman earned his Ph.D. in Applied Physics at the University of Michigan. While pursuing his degree, he was honored with a Rackham Predoctoral Fellowship, which recognizes dissertations that are unusually creative, ambitious, and impactful. His thesis project involved designing a new type of thermometer for use at temperatures very close to absolute zero, and allowed him to work with the strongest (DC) magnet in the world, the Hybrid Magnet at the National High Magnetic Field Laboratory in Tallahassee, FL. He also holds B.S. degrees in Mathematics and Physics from Lafayette College.

Dr. Tinsman has published several articles on physics, on topics including quantum oscillations of electrical resistivity; two-dimensional Fermi surfaces (both in Science magazine); and how magnetic fields change the flow of heat through bismuth, which is his favorite element. He has also presented at a meeting of the American Physical Society on the field-dependent thermal conductivity of strontium copper borate, a study supported by the Office of Naval Research.

He is particularly interested in demonstrating the interdisciplinary links between physics and mathematics, as well as putting physics in context with experiments, individual research projects, and simulations, and is the proud coach of our VEX Robotics Teams.

Jessica Tocio believes in always putting her students’ interests at the heart of her hands-on lessons, generating excitement in her classroom, and making children feel like they have a say in what they are learning.

Ms. Tocio received a B.A. in History and Elementary Education from the University of Massachusetts Amherst and earned her M.Ed. from Lesley University. Trained in Readers and Writers Workshop, Ms. Tocio has a strong passion for teaching literacy and developing a love of reading and writing for her students. She brings over eight years of education experience to our school, having taught students in pre-kindergarten through second grade.

Lyn Weissinger is a dedicated educator with a strong passion for nurturing young minds through differentiated instruction, data-driven practices, and effective classroom management strategies.

With a B.S. in PreK-4 Education from Rosemont College and an M.Ed.in Educational Leadership from American College for Educators, Ms. Weissinger brings a wealth of knowledge and experience to the classroom. She has planned, created, and facilitated engaging and supportive learning environments for both classrooms and individual students in charter, public, and private elementary schools.

Jarred Williams brings deep curiosity, creativity, and a passion for challenging dialogue to Upper School English classes at The Grayson School.

Mr. Williams earned his M.F.A. in Creative Writing on a Colby Fellowship from the University of Michigan and his B.A. from Drew University, where he double-majored in English Literature and Classical Studies while serving as a research assistant for both departments. Prior to joining the Grayson team, he taught across middle, upper, and collegiate levels, holding roles including Middle and Upper School English teacher at Springside Chestnut Hill Academy, Middle School Latin teacher and Diversity Coordinator at Trinity School in Manhattan, Upper School English teacher at Sayre School, and English Department Chair and Dean of Student Life at Doane Academy.

An accomplished writer, Mr. Williams was awarded a Hopwood Award for a novel draft and the Burke Award for Literary Studies, with published works spanning fiction, poetry, and essays. He is dedicated to cultivating brave classroom spaces where students take academic risks, explore great literature, and develop their authentic voices.

Being able to positively influence and inspire youth is important to Leon Williams as an educator. He enjoys motivating and encouraging his students to push their ideas forward and challenge themselves creatively through different forms of expression.

Mr. Williams holds a B.F.A. degree from Marywood University, and has taught classes focused on art, design, and creativity as an adjunct professor at Harcum College and in aftercare programs for grades K-12 including 3D Design, Visual Storytelling, Cartooning, and Digital Photography.

Mr. Williams is also an Ultimate Frisbee and Archery coach at The Grayson School.