An Act amending the act of March 10, 1949 (P. L. 30, No. 14), known as the "Public School Code of 1949," further providing for the imposition of taxes on earned income by school districts which eliminate certain other taxes; further providing for the sale of unused and unnecessary lands and buildings; increasing reimbursement for school building construction; providing for special aid to school districts suffering loss of tax revenue due to reorganization or bankruptcy of businesses in the district; and making editorial changes.