Our 2017 Leadership Team

John Adams

The River School, Weston, MA

John is in his second year at The Rivers School, where he teaches mathematics and coaches Nordic skiing and lacrosse. He spent the previous 4 years at The Dublin School, serving as department chair in mathematics, head varsity lacrosse coach and a dorm head. In his role as department chair at Dublin, John spearheaded a comprehensive curriculum review for the department and revitalized the course offerings. John received his B.A. in economics from Bates College, where he captained the lacrosse team. John also worked sales and finance at CEB and mentored with entrepreneurship program BUILD.

Sami Atif

Phillips Exeter Academy, Exeter, NH

Dr. Atif is a native of Philadelphia, PA. A self-proclaimed product of public schools and of Philadelphia’s Muslim community, his biggest accomplishments in life have been his young family and his two pilgrimages to Makkah.
A graduate of two historically black universities, Cheyney University of Pennsylvania and Delaware State University, he holds teaching certifications in mathematics and special education. Prior to joining the faculty of Phillips Exeter Academy, Dr. Atif taught at Delaware State University and Kent County Alternative Programs in Dover, Delaware.

David Bannard

Collegiate School, Richmond, VA

David has been teaching since 1969 including 17 years at the Groton School and the past 27 years at the Collegiate School in Richmond, Virginia. As one of the original beta testers for The Geometer's Sketchpad, he has been using technology in the classroom since the first conference in 1985. He now makes extensive use of Geogebra. He has participated in almost every Anja S. Greer Conference since 1985.

Kevin Bartkovich

Phillips Exeter Academy, Exeter, NH

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 (now 5) to the US in 2008 and moved to Exeter in the fall of 2009, where Kevin began teaching in the math department at PEA. 

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.

Mary Bourassa

West Carleton Secondary School, Ottawa, Ontario, Canada

Mary currently teaches mathematics at West Carleton Secondary School in rural Ottawa, Canada. She is a strong advocate of the appropriate use of technology in the classroom. She connects with other educators via Twitter (@MaryBourassa) and learns everyday from others' blogs. She has presented workshops across Canada, the US and Australia. She is a past director and Vice-President of the Ontario Association for Mathematics Education. Winner of several awards from NCTM and OAME, Mary continually strives to learn new and better ways of helping students learn and love mathematics.

Floyd Bullard

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

Floyd has taught high-school mathematics for seventeen years, including two as a Peace Corps Volunteer in Benin, West Africa, and is currently at the North Carolina School of Science and Mathematics. Floyd has been involved with the AP Statistics program since 2002 and has recently served on the test development committee.  In May 2009 he received a PhD in statistics from Duke University; his dissertation was about exoplanet detection. Floyd lives in North Carolina with his partner Rick.

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 32 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 28 years, including ten years as a teacher leader in the Woodrow Wilson Fellowship Foundation and 26 years as an instructor in the Anja S. Greer Conference. Dan likes to live by the motto, "See the World, Do Math."

Jonathan Choate

Groton School, Groton, MA

Jonathan has taught mathematics at Groton School since 1966. He is the co-author of The Dynamics Toolkit, four books covering topics in fractal geometry and chaos theory. He has served on both NCTM's Algebra and Discrete Mathematics Task Forces. His column, Geometer's Corner, is a regular feature in COMAP's Consortium newsletter, and he has created a web site dedicated to the teaching of three-dimensional geometry which can be found at www.zebragraph.com. The website includes information about how Google SketchUp can be used in the teaching of geometry.

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 one 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.

Al Coons

Buckingham Browne & Nichols School, Cambridge, MA

Al has taught mathematics for 39 years at Mercersburg, Andover, and Buckingham Browne & Nichols. He was an early advocate for student-centered, connected education. He is a past editor of Tech Tips in The Mathematics Teacher. He organized and presented at some of the earliest meetings of AP Statistics teachers, and was an AP grader and table leader. Other workshops include Taxicab Geometry, Teaching Chaos in Geometry & Precalculus, and a Roller Coaster Project in Calculus. Al coached seven sports, was an outdoor leader, and can be found enjoying the mountains and seas during vacations.

Natasha Crawford

National Cathedral School, Washington, DC

Natasha has taught mathematics for 13 years, including three at Phillips Exeter Academy. She currently teaches at The National Cathedral School in Washington, D.C. She has taught at both the high school and community college level. Natasha holds a BS and MST from Clark Atlanta University and an MS from San Diego State University. She is particularly interested in using a problem based approach to her classes. She has led workshops on using Exeter's problem sets in traditional class settings and Intro to Desmos for Algebra.

Diana Davis

Williams College, Williamstown MA

Diana works at Williams College, teaching college students in problem-centered, discussion-based math classes, and doing research in geometry. Diana attended Phillips Exeter Academy as a highly engaged high school student, and has also taught in the PEA math department. This will be her fourth time as a leader at the conference. She loves to engage people in thinking about math, especially by drawing pictures and making geometric models. In the wider world, she 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!

Christine Fitzgerald

The Rivers School, Weston, MA

Christine teaches math at The Rivers School in Weston, MA where she also coaches soccer and softball.  She has been teaching for the last seven years, including a year in the Phillips Exeter math department.   She has experience teaching a range of courses including Geometry, Algebra II, Precaclulus, and AP Statistics, and continues to integrate the student-centered Harkness methods she learned while teaching at Exeter into her classroom today.  Believing that technology should always be used as a tool to dig deeper into student learning, Christine uses the iPad almost daily in her teaching.

Peter Flynn

Texas Instruments/The University of Melbourne, Melbourne, Australia

Peter was a secondary school mathematics teacher for approximately a decade before joining the University of Melbourne's Graduate School of Education where he currently teaches a variety of mathematics and mathematics education subjects. His mathematics education interests primarily involve implementing technology into mathematics teaching, learning and assessment. Peter is an experienced workshop presenter who has presented many workshops to both Australian and international audiences.

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 high school teachers and students in precalculus and calculus courses and was involved with distance learning broadcasts for many years. She has been an instructor in numerous workshops for teachers focusing on Precalculus, Calculus and Statistics. Most Saturday mornings you can find her exploring math with middle school students in the Chapel Hill Math Circle. When school is not in session she is knitting or quilting or in her garden.

Frank Griffin

Cate School, Carpinteria, CA

Frank has taught at Cate School (CA) since 1979, serving as Department Head (1988 to 2015) and Director of Studies (1995 through 2003).  He holds a teaching chair at Cate and was a recipient of a Tandy Technology award.  In addition to math, Frank has taught courses in economics and geography and has coached basketball and tennis. Frank was a recipient of a Woodrow Wilson Foundation summer Fellowship in the summer of 1985, and this experience led to numerous workshop opportunities in mathematics and technology. He has been a leader at the Anja S. Greer Conference since 1995.

Aviva Halani

Phillips Exeter Academy, Exeter, NH

Aviva has B.A. from Wellesley, and an M.A. and a Ph.D. from Arizona State. Though her degrees are in mathematics, her research has focused on students' problem solving approaches to counting problems, instructional interventions, and student understanding of calculus concepts. She has presented her results at numerous conferences. In Arizona, she was a Math Content Expert for Adaptive Curriculum, an ed tech company which develops highly interactive digital math and science lessons, and taught at ASU. She has been teaching various courses from algebra to calculus to proof at Exeter since 2013.

Maria Hernandez

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

With over 25 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 secondary schools since 1995 after teaching at Merrimack College  and the State University of Buffalo for 8 years. He is a student of Zbigniew Zielezny and earned his Ph.D. in Distribution Theory in 1989. He created a "math for teachers" seminar course while at Merrimack that was based on the use of historical materials and is a vigorous proponent of teaching the history of mathematics. He has been teaching a course in history of math at the secondary level at Exeter since 2002. He holds the Smith Teaching Chair in Mathematics.

Doug Kuhlmann

Phillips Academy, Andover, MA

Doug recently retired after 40 years in secondary boarding schools, the last 31 at Philips Academy. He received his B.S. in math from St. Louis U. in 1968, and his Ph.D. from Northwestern in 1978. He enjoys learning and teaching mathematics and is particularly interested in using GeoGebra in precalculus and calculus courses in high school. An active participant on the AP Calculus EDG, he has studied at Cambridge University during his first sabbatical and at Boston University during his second. He enjoys walking with his wife along Plum Island beach and also enjoys singing in the choir.

Ron Lancaster

University of Toronto, Toronto, Ontario, Canada

Ron is an Associate Professor at the University of Toronto where he teaches mathematics methods courses for future middle and high school teachers.  He has over 20 years of experience teaching grades 7-12 mathematics.  Ron's professional activities include consultations and conference presentations in North America, Asia, England, Abu Dhabi, Dubai, Qatar, Africa and India.  Ron is an author for the NCTM (The Mathematical Lens) and member of the Advisory Board for the Museum of Mathematics in New York City.  He is the recipient of the 2015 Fields Institute Margaret Sinclair Memorial Award.

Karen Lassey

Phillips Exeter Academy, Exeter, NH

Karen has taught at Phillips Exeter Academy since 1996, in the Science and Mathematics Departments. She has taught summer math courses through the PEA Summer School Outreach, for neighboring school districts. Through the Exeter Math Institute and the Exeter Humanities Institutes, she has conducted workshops on student-centered learning. Since 2006, Karen has worked closely with the Exeter math curriculum, participating in summer editing work and writing and developing teacher commentary for the entry-level (Math 1) materials. Currently, she is also serving as the Dean of Academic Affairs.

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.

R.J. McDaniel

Boys' Latin of Philadelphia, Philadelphia, PA

R. J. received a BS in Civil Engineering from the University of Kansas, but swiftly moved to Yosemite National Park and never became an engineer. His initial foray into education was as a mathematics teacher and director of student activities at a boarding school in Ontario. His love of games and competition continually impacts his approach to teaching mathematics. R.J.has lived in Washington, Kansas, Louisiana, California, Canada, Germany, and for the past Eleven years has resided in Philadelphia where he is the Math Department Chair and Head Basketball Coach at Boys' Latin of Philadelphia.

Greta Mills

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

Greta's fascination with mathematics has evolved over her 20-year teaching career from a love of pure math to embracing applied mathematics, and she strives to teach all classes from a modeling perspective. As the recipient of New Hampshire's 2010 Christa McAuliffe Sabbatical Award, Greta shared her modeling experience with other NH schools. Since 2012, Greta has served as a judge for the Moody's Mega Math Challenge, and she regularly presents at NCTM conferences focusing on modeling applications, from Geometry to Calculus and beyond.

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 18th year at the Conference.

Emma Phillips

University of New Hampshire, Durham, New Hampshire

After teaching at Phillips Exeter Academy for three years, Emma has returned to school and she is currently pursuing a Master's in Mathematics at UNH. While at Exeter, Emma taught courses in all four math books, as well as Multivariable Calculus. Emma is especially passionate about using technology in mathematics. She spends much of her time creating demonstrations on GeoGebra and Desmos, and even dressed up as Desmos for Halloween one year. 

Philip Rash

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

Philip is in his thirteenth 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 36 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 (T3 national instructor), SMART Boards, iPads, problem solving strategies, questioning techniques, and computer algebra systems. Tom is a frequent speaker at NCTM and T3 national, state, and regional conferences. He is a Presidential Awardee and has earned National Board Certification.

David Sabol

Saint Ignatius High School, Cleveland, OH

Dave is a teacher and department chair at Saint Ignatius High School in Cleveland, OH. His classrooms focus on discovery through play and discussion, often utilizing technology tools that allow students to interact with each other. In 2016, he was chosen as a Desmos Teaching Fellow which allowed for special collaboration with the Desmos team and several other Desmos Fellows from all over the US. Outside the classroom, he founded and currently runs a live storytelling show, Told Cleveland. 

Filip Sain

Phillips Exeter Academy, Exeter, NH

Filip worked in industry for a number of years, in a defense think tank and in a software company, before becoming a teacher in 2012. He has taught high school mathematics of all levels. Filip has been at Phillips Exeter Academy since 2014.

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 Sauer is the math department chair at William Mason High School in Mason, Ohio. 2016-2017 marks his 16th year at Mason and his 27th 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.

Carmel Schettino

Deerfield Academy, Deerfield, MA

With Problem-Based Learning as her specialization, Carmel obtained a Ph.D. in Math Education while teaching at the secondary level for many years. She is passionate about helping teachers grapple with the pedagogical and curricular questions that rise when PBL is brought into the math classroom.  Other areas of expertise include gender equity, discourse, technological implications and PBL's relationship to the Common Core. Carmel does school consulting, speaking engagements for NCTM and authors articles  about PBL in the Mathematics Classroom.  You can follow her on Twitter at @SchettinoPBL.

Philip Todd

Saltire Software, Tigard, OR

Philip used mechanical calculators for literal "number crunching" in high school, punch cards on an IBM mainframe in university, and paper tape on a mini in his first job in the British avionics industry.
Since then he has worked in ever more friendly environment on ever cheaper and more powerful computers, developing software for mechanical engineers, for mathematics education and for carpet laying.  When he led the development of a CAS for the Casio ClassPad, he was astonished to note that the calculator had more on-board memory than the AWACS aircraft he had worked on 20 years before.