Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Valley Stream 24 Union Free School District is a public school district in New York State that serves about 1000 students in the villages of Valley Stream and Lynbrook in Nassau County with a staff of 200 (120 teachers and 80 support staff). It is unique in that most school districts in New York State encompass grades K 12 while this district includes elementary grades K 6 only. It is one of three Valley Stream districts (the others are Elementary Districts 24 and 30) whose students graduate to a separately managed district, Valley Stream Central High School District, for the higher grades. The average class size is 20 students (all grades). The student-teacher ratio is 10:1.