fbpx Our 2019 Leadership Team | Phillips Exeter Academy

Our 2019 Leadership Team

Kevin Bartkovich, Conference Director

Phillips Exeter Academy

Kevin was a teacher for 17 years at the N.C. School of Science & Math, where he was part of a department that developed curricular materials for contemporary high school math and wrote textbooks for precalculus and calculus. He then embarked upon a 10-year adventure in Uganda where he and his wife JD established Christ School - Bundibugyo, a boarding secondary school located in a remote village near the border with Congo. Kevin and JD returned with their 4 children to the US in 2008 and moved to Exeter in the fall of 2009, where Kevin began teaching in the math department at PEA. They are foster parents, and their family has grown to include 7 children. After leading courses at the conference off and on for the past 30 years, Kevin was appointed Conference Director in 2018.

Nils Ahbel

Deerfield Academy, Deerfield, MA

Nils began his career as an engineer, but soon found teaching was his passion. He has taught math for the past 31 years, currently Deerfield Academy. He is an author of 3 UCSMP textbooks; for 20 years has made his own Alternative to Precalculus course available free online. He was on the product development team for Texas Instruments graphics calculators. For 30 years, Nils has been a speaker at the Exeter Conference & many national/international conferences including NCTM, NCSSM, TSM in England, and TTL in Australia. Nils speaks at & consults for schools on relevant and innovative curriculum.

Eric Bergofsky

Phillips Exeter Academy, Exeter, NH

Eric has taught high school mathematics since 1973 and is currently the Department Chair and in his 39th year as an instructor at Phillips Exeter Academy. He is a former leader and director of the Exeter Math, Science, and Technology Conference, and was also the director of the Exeter Mathematics Institute from 1992-2013. Eric has had a long time interest in the use of technology activities as well as hands-on activities in the classroom. Eric co-authored the book "Exploring Algebra with The Geometer's Sketchpad", published by Key Curriculum Press.

Dan Butler

Mounds View High School, Arden Hills, MN

Dan has been teaching mathematics at the middle school and high school level for the past 35 years in the public school system. He has taught all mathematics courses from prealgebra to multivariable calculus and linear algebra. Dan gives numerous workshops in mathematics both in the United States and abroad. He has been involved in professional development workshops for the past 30 years, including ten years as a teacher leader in the Woodrow Wilson Fellowship Foundation and 28 years as an instructor in the Anja S. Greer Conference. Dan likes to live by the motto, "See the World, Do Math."

Ken Collins

Charlotte Latin School, Charlotte, NC

Ken has a B.S. in physics and M.S. in math from BPI/NYU and a Ph.D. from Purdue University. He has taught for fifty two years in middle school through graduate school. His focus is on effective use of technology and applying mathematics to analyze current issues. He teaches calculus and algebra II with extensive use of calculator technology. Ken gives five to ten workshops each year at regional and national conferences of NCTM, ACA, and T^3. He is currently writing curriculum material for classroom explorations in mathematics and using mathematics to analyze critical problems in our society.

Diana Davis

Swarthmore College, Swarthmore, PA

Diana works at Swarthmore College, teaching college students in problem-centered, discussion-based math classes, and doing research in geometry and dynamics. She attended Phillips Exeter Academy as a highly engaged high school student, and has also taught in the PEA math department. This will be Diana's fifth year as a leader at the conference. She loves to create opportunities for people to think deeply about math and discuss it with each other. In the wider world, Diana is best known for making a video that explains her math research through dance. Check it out: http://vimeo.com/47049144

Anthony DiLaura

Zeeland Public Schools, Zeeland, MI

Anthony is a high school math teacher, STEM educator, and instructional technology specialist. In 2013 he was awarded the “Apple Distinguished Educator” title and in 2015 he was nationally recognized as the “iBooks Author Trainer of the Year” for his innovative workshops that help educators author multi-touch textbooks for the iPad. Anthony teaches in a 1:1 iPad environment and testifies to the profound impact iPads and iBooks have on student learning. Anthony enjoys sharing his knowledge and enthusiasm while helping teachers redesign their instruction by adding iPads to the math equation!

Stephanie Girard

Phillips Exeter Academy, Exeter, NH

Stephanie began teaching in 1983 at Charlottesville High School in Charlottesville, Virginia after completing her Master's degree at the University of Virginia.  She joined the faculty of Phillips Exeter Academy in 1986. She has been active in the mathematics departments' editorial work for several summers,has been a MST Conference participant several times,was a leader in the Exeter Math Institute for two years,is a faculty member of Exeter Summer and is the co-coordinator of the Summer Math Acceleration Program. Stephanie is the current John E. and Mary E. Smith Professor of Mathematics.


Julie Graves

North Carolina School of Science and Mathematics, Durham, NC

Julie has taught mathematics at the North Carolina School of Science and Mathematics since 1985. She has developed curriculum for precalculus and calculus courses and was a contributing author of two textbooks written by the NCSSM Math Department. She has led many workshops for teachers focusing on Precalculus, Calculus and Statistics. Her interests include helping students and teachers become more confident mathematical modelers. She taught at Deerfield Academy for the 2017-18 school year. She moved back to North Carolina in June of 2018. Since then, she has been making her garden grow again.

Vicki Greenberg

The Lovett School, Atlanta, GA

Vicki has been teaching high school and undergraduate mathematics for 20 years and statistics for 12 years. She has worked on numerous textbook projects including Strive for a 5 review book, Statistics and Probability with Applications, and The Practice of Statistics 6e. She has presented to teachers at NCTM and GCTM. She is currently an AP Statistics mentor through NMSI and a reader for the AP Statistics exam. Her educational interests include making mathematics fun and relevant to enhance her students' mathematical and statistical understanding. 

Maria Hernandez

The North Carolina School of Science and Mathematics, Durham, NC

With over 30 year of teaching experience, Maria has developed curricula for high school students in various mathematics courses. She has lead teacher collaborations via distance learning and has taught workshops for courses from Algebra I to AP Calculus. Her focus is using mathematical modeling, discovery-based activities, technology and real-world problems to engage students as active learners in the mathematics classroom. Maria received The 2009 Presidential Award for Excellence in Mathematics Teaching and The UNC Board of Governors Award for Excellence in Teaching in 2013. 

Jeff Ibbotson

Phillips Exeter Academy, Exeter, NH

Jeff has been teaching in private schools since 1995. Prior to that he taught mathematics at Merrimack College. While there he designed a course in history of mathematics for secondary level teachers. He has also been involved in teaching advanced math at high schools (Group Theory, Real and Complex Analysis and Game Theory)and currently serves on the MAA's Board of Governors. 

Ron Lancaster

University of Toronto, Toronto, Ontario, Canada

Ron is an Associate Professor at the University of Toronto where he teaches mathematics courses for pre-service middle and high school teachers. He has 23 years of experience teaching grades 7-12 mathematics. Ron's professional activities include consultations and conference presentations in North America, Asia, England, the Middle East, Africa and India. Ron is an author for the NCTM (The Mathematical Lens) and member of the Advisory Board for the Museum of Mathematics. He is the recipient of the 2015 Margaret Sinclair Memorial Award in Mathematics Education awarded by the Fields Institute.

Philip Mallinson

Phillips Exeter Academy, Exeter, NH

Philip started his math teaching career in 1970 at a tiny private school, now defunct, in Vermont. From there he went to the University of Washington in Seattle to earn a license to teach mathematics. He was an instructor briefly at the University of Washington and then taught at a private school in Seattle until 1994. At this point Tom Seidenberg lured him to Exeter where he has been until he retired in 2015. He has been active with the geometry team of the Woodrow Wilson workshops in the 80's and 90's and also with the Park City Math Institute since its inception. 

Mike May

Saint Louis University, St. Louis, MO

Mike earned his Ph.D. in mathematics from U.C. Berkeley. He has worked on appropriate ways to incorporate technology into teaching for more than 20 years. He has made presentations and published on a variety of technologies including: designing computer classrooms, appropriately using graphing calculators, Maple, Excel, applets, GeoGebra, and automated homework systems. Mike is an AP reader, a PREP workshop leader (https://prep11geogebra.pbworks.com), a Fullbright specialist in math ed, an MAA trainer for WeBWorK, and has designed material used in MyMathLab.

Greta Mills

Oxbridge Academy of the Palm Beaches, West Palm Beach, FL

Greta's fascination with math has evolved over her career from a love of pure math to embracing its applications. As the recipient of New Hampshire's 2010 Christa McAuliffe Sabbatical Award, Greta worked with NH teachers to design and pilot modeling projects. Her math modeling class has produced winning teams in the HiMCM Modeling Contest, and Greta has served as a judge for the Moody's Mega Math Challenge since 2012. She is also a member of the Math Modeling Faculty Mentoring Network. In 2017, Greta's Digital Logic class built and wrote code for a drone that *almost* flew!

Stuart Moksowitz

Humboldt State University, Arcata, CA

Stuart plays with puzzles when not teaching math. Inspired by Martin Gardner and Lewis Carroll, he uses puzzles to teach math.  Besides puzzles, Stuart has a passion for using history, technology, and multiculturalism as a means for making math more meaningful, useful, and alive. Besides 24 years of teaching math and math education classes at Humboldt State U on the north coast of California, besides collecting and studying puzzles for almost 60 years, Stuart leads workshops for teachers around the world, has been a math coach, a conference chair, and an author of teacher resource materials.

Paul Myers

The Paideia School, Atlanta, GA

Paul has taught mathematics and statistics for 48 years, including 8 years in Europe & Africa, 32 years at Woodward Academy, 2 years at Georgia Tech, and 6 years at The Paideia School in Atlanta.  He has been an AP Statistics and Pre-AP Mathematics consultant for The College Board and a Fathom software consultant since 1997 and has conducted one-day and weeklong summer AP Statistics workshops in Germany, China and throughout the United States.  His recent projects include developing IPAD-driven courses in Operations Research and Data Science.

Ira Nirenberg

Benjamin Franklin High School, New Orleans, LA (retired)

Ira worked as a geophysicist for six years prior to entering the teaching field. His teaching career spans 30 years having taught at Benjamin Franklin High School and Lusher High School in New Orleans, LA, the University of Chicago Laboratory Schools, several universities, and schools abroad. He has taught AP Physics C & B, Astronomy and much of secondary mathematics. He has written four books: Intermediate Physics (Free eBook), Living With Math (Free pdf version--www.ontele.com), The Fraction ThinkBook (eBook) and, Alabama Whistle (fiction-eBook). This will be his 19th year at the Conference.

Philip Rash

North Carolina School of Science and Mathematics, Durham, NC

Philip is in his fifteenth year as a member of the NCSSM Mathematics faculty. A NC native, he earned Bachelor and Masters degrees in western NC, and has high school and university teaching experience prior to NCSSM. At NCSSM Philip teaches Calculus, Statistics, and several post-calculus elective courses. He's also very involved with math contests, including co-chairing the NC State Math Contest committee of the NC Council of Teachers of Mathematics. Some of Philip's awards include the 2016 UNC Board of Governors teaching award and a 2008 MAA Edyth May Sliffe Award.

Tom Reardon

Austintown Fitch High School and Youngstown State University, Youngstown, OH

Tom taught for 35 years at Fitch High School and 38 years at Youngstown State University. Since 1995, he has been doing Professional Development about creatively integrating pedagogy and appropriate technologies in 7 - 12 math classrooms nationally and internationally. His specialties are graphing technologies, SMART Boards, problem solving strategies, questioning techniques, ACT and SAT prep, and math modeling for social awareness. Tom is a frequent speaker at NCTM and other national, state, and regional conferences. He is a Presidential Awardee and has earned National Board Certification.

Paul Rodriguez

Troy High School, Fullerton, CA

Paul has taught for 25 years, including AP Statistics for 21 years.  He works for The College Board and has participated in the AP reading since 2004, recently as a rubric team member.  Paul served 7 years on the AP Statistics Test Development Committee, including 3 years as the co-chair.  Paul is the co-author of the test bank for the Statistics and Probability with Applications textbook, and the new AP Statistics curriculum framework.  He has conducted multiple summer institutes, and enjoys the opportunity to share his love of statistics, simulations, and technology.

Annalee Salcedo

Cate School, Carpinteria, CA

Annalee has taught in independent and public high schools since 1996.  She joined the Cate faculty in 2009 as a member of the math department, where she teaches Algebra 2, Pre-Calculus, and Calculus.  In 2015, she was appointed Head of the Math Department and was also awarded the Paul M. Denison '52 Teaching Chair for excellence in teaching. In 2011, she was the first recipient of Cate’s Centennial Award, recognizing innovation in classroom instruction. Annalee works in Cate's Outdoors Program, and chairs the Design Team, working with faculty to improve instructional and assessment practices. 

Johnothon Sauer

William Mason High School, Mason, Ohio

Johnothon is the math department chair at William Mason High School in Mason, Ohio. 2018-2019 marks his 18th year at Mason and his 29th year of teaching. Raised in Columbus, Ohio, Johnothon earned his B.S.Ed. from The Ohio State University, taking courses that led to his certification to teach mathematics and music in grades 7-12. He subsequently earned his M.A.T. and Ph.D. in Mathematics from The University of Cincinnati. Johnothon is a strong advocate of student-centered, discussion-based learning, and in particular of the Harkness Method of instruction and Evidence-Based Assessment.

Jessica Schenkel

Porter-Gaud School

Jessica is a teacher at the Porter-Gaud School in Charleston, SC. She is the chair of the math department and oversees the development and implementation of the curriculum for grades 1 – 12. Jessica has been teaching upper school mathematics for eleven years. She serves as the co-sponsor to the student council at her school and loves working with students in a variety of capacities. She is a strong advocate for offering relevant mathematics curriculum and the development of the whole student. 

Lauren Shareshian

Oregon Episcopal School

Lauren's foray into teaching began as a graduate instructor for the Duke laboratory calculus program, where real world, hands-on activities were emphasized. Since then, Lauren has continued to incorporate modeling and technology into courses at the Oregon Episcopal School in Portland, OR. She has coached winning teams in the HiMCM modeling competition and in her quest to combine math, statistics, and computer science topics, she recently completed a Seattle data science intensive. Currently, she is incorporating Python and data science into her school's math and computer science curriculum.

Nat White

Groton School

Nat has loved mathematics for as long as he can remember, and he wants others to share that same love. A teacher and coach at Groton School, Nat's first deep dive into the fun and memorable aspects of high school math came as a participant in this conference. Since then, he worked in an early iteration of the Undergrad Biology and Mathematics program at UW-Milwaukee and has worked with colleagues and students at Hotchkiss (where he was a department chair) and Groton to make high school math memorable, meaningful, and fun for students and teachers alike.

Tobin White

Cate School

Tobin began his teaching career in the late 1990s at Hebron Academy in Maine. In 2000, he moved to California to pursue a PhD in mathematics education at Stanford. He then spent 14 years as a professor at UC Davis, where he taught undergraduate and graduate courses in education and ran a research lab focused on the design of novel technologies for teaching and learning math and science. He recently relocated to Santa Barbara, and currently teaches mathematics and computing at Cate School.