Washington International School 3100 Macomb St., NW Washington, DC 20008 View map location Phone:  202-243-1800 Fax:  202-243-1808 Head of School:  Clayton Lewis Private School, Grades Pre-K - 12 School Enrollment:  890 IB Students:  125 (all diploma) Diploma Program Coordinator:  David Merkel E-mail:  merkel@wis.edu Web Site:  Washington International School WIS is an "all-IB" school, with authorized IB programs from PreKindergarten through Grade 12. Every WIS graduate in the school's history has been a full IB student Please contact Dawn Darling darling@wis.edu for information on the Primary Years Program and Jim Reese reese@wis.edu for information on the Middle Years Program at Washington International School. IB Courses Offered Start