This New York State Education Department bulletin provides guidelines and information on determining state building aid for public school construction pursuant to New York State Education Law: section 3602(6)(1) & (2). Guidelines address state building aid's purpose, eligibility, and formula for aid estimation. Included are guidelines on minimum classroom sizes for K-12 schools; aid requirements for elementary school additions; rating capacity for K- 12, special schools, and their additions; and determination of allowable expenses for building aid and eligible reconstruction projects. (GR)