Faculty & Staff

Teaching Staff

GJA is home to 20 staff members and countless volunteers, led by Head of School, Andre Del Valle. Mr. Del Valle graduated from Syracuse University with a B.A. in Political Science and Psychology and holds two master’s degrees from Pace University with concentrations in Educational Administration and Teaching. Mr. Del Valle joined the faculty of GJA in 2004, becoming Assistant Head of School for Operations in 2007. His work at GJA includes leadership in all areas of school life: faculty development, admissions, fundraising, student/family outreach, and academics.

B.A. Spanish Language and Music

Colgate University, 2001

Spanish, Grade 5, 6; Math- Grade 6

B.S. Music Education, Penn State 1993

M.A. Jazz Studies, DePaul University 1997

Band (Instrument), Grades 4-8

B.A. Sociology, Emory University, 2001

M.S.ed., Childhood Ed, Bank Street College, 2013

Math and Science, Grade 5

B.A. Elementary Education, Bucknell University, 2010

M.S. Instructional Design, Manhattan College (expected 2017)

Technology, Grade 4-8

B.A. Childhood Education & Mathematics, Hofstra University, 2013

M.S.ed., Literacy Studies, Lehman College (expected, 2017)

Teacher, Grade 4

B.A. Evolutionary Biology, Harvard College, 2013

Science, Grade 6-8

B.A. English, University of Illinois Champaign-Urbana, 2007

M.A. English Secondary Education, New York University, 2009

English and Civics, Grade 8

B.A. English and Art History, Wellesley College, 2013

Language Arts and Social Studies, Grade 5

Lehman College, CUNY

Office Manager

B.A. English, Georgetown University, 2006

M.Div. Harvard University, 2013

Language Arts Grade 6; Public Speaking Grade 7

Operations Manager

B.A. Spanish Literature, Colgate University, 2012

M.A.T. Spanish, CUNY Hunter College, 2014

Spanish, Grades 7-8, Global Scholars Grade 6

B.A. English, Brown University

J.D. Northwestern University

M.A.T. English Education, NYU

Language Arts, Grade 7

B.A. Mathematics, Queens College, CUNY, 2013

M.A. Mathematics Education, Columbia University, 2016 expected

Mathematics, Grade 7-8

Senior Leadership Team

Title Name Qualifications
Head of School Andre Del Valle B.A., M.A., M.A.
Associate Head of School Aisha Lloyd Williams B.A., M.A.
Dean of Students Cristal Valentine B.A., M.S.
Director of High School Placement Bernadette Sarlo B.A., Certificate (College Counseling)
Director of Development Sara Murphy B.A., M.A.
Associate Director of Development Rebecca Tatum B.A., M.A., Ph.D.


In grades 4 and 5 classes are kept to 12 students or less, in 6, 7 and 8 classes are kept at 16 students or less.

The best way to contact teachers is via email. Their emails are generally the first letter of their first name followed by their last name @georgejacksonacademy.org.

GJA upper school students have an thorough advisory system in which each students sees his advisor up to nine times weekly in addition to class time.