NYS English Language Arts (ELA) ---------MAY
NYS Mathematics ------------------------- MAY
NYS Science (performance and written) --END OF MAY/BEGININNING OF JUNE
The links below are a direct link to the New York State Education Department, and to their sample tests in English Language Arts and Mathematics.
ELA - Book 1 (Day 1 of the test)
ELA - Book 2 (Day 2 of the test)
ELA - Book 3 (Day 3 of the test)
Mathematics http://www.emsc.nysed.gov/3-8/appB.pdf