The California Association of School Business Officials is the premier resource for professional development and business best practices for California's school business leaders. CASBO is dedicated to promoting excellence and professionalism in all aspects of school business. Founded in 1928, CASBO serves more than 15,000 members by providing certifications and training, promoting business best practices and creating opportunities for professional collaboration. CASBO members represent every facet of school business management and operations. The association offers public school leaders an entire career's worth of growth opportunities.