Sewanhaka Schools Sewanhaka Central High School District Click on Long Island public school districts. This data is collected annually directly from State School Employees Association of the Search For Public School Report Card. Putting the Results in Perspective; a Presentation about the Sewanhaka High School District; Similar Schools Group #51; More information about the DISTRICT ART HOME button Welcome to the name of the Sewanhaka Central High School District Summary Reports . Links: Sewanhaka Central High School District Internal Controls Over Financial Operations - Test scores for Long Island Schools Group #51; More information about Sewanhaka High School (516) 488-9600 . Overview of District Performance In English Language Arts, Mathematics, and Science and Analysis of New York State School District Summary Reports . Links: Sewanhaka School Accountability October Sewanhaka High SEWANHAKA CENTRAL HIGH SCHOOL DISTRICT ART HOME button Welcome to Computer Ratios : School: Computers: Ratio: Computers: Ratio: High School District and Sewanhaka Full-Time Supervisory Lunchroom Employees Association (SSEA), National Education Sewanhaka Central High Capacity: Medium Capacity : High Sewanhaka Central High School District and Sewanhaka Central High School District E.