All school property owned by any school district, real and personal, that is occupied and used by any school district for public school, recreation, or any other purposes provided for by this act, shall be, and hereby is, made exempt from every kind of State, county, city, borough, township, or other tax, as well as from all costs or expenses for paving, curbing, sidewalks, sewers, or other municipal improvements: Provided, That any school district may make any municipal improvement, in any street on which its school property abuts, or may contribute any sum toward the cost thereof.
24 P.S. § 7-776