Because India is so large, the ASER Centre has 29 state teams. The state teams play the same function as a core central team would in smaller country. ASER has between 500 and 600 District partners across India. District partners are NGOs, CSOs, National Service Scheme volunteer groups, private and government colleges, and teacher training institutes. ASER contracts approximately 1,000 Master Trainers every year, and they are responsible for training between 20,000 and 30,000 volunteers each year.