If you're looking for central government schools in Kerala that offer quality education at a low cost, you can consider kendriya Vidyalayas (KVs) and Jawahar Navodaya Vidyalayas (JNVs).Both are central government-run schools known for providing affordable education.

1. Kendriya Vidyalayas (KVs)

- Managed by the Kendriya Vidyalaya Sangathan under the Ministry of Education, Government of India.

Very affordable, with nominal fees for various classes. Special fee exemptions are available for girls, SC/ST students, and children of KVS employees.

- There are several Kendriya Vidyalayas across Kerala, including in cities like Thiruvananthapuram, Kochi, Kozhikode, and Thrissur.

2. Jawahar Navodaya Vidyalayas (JNVs)

-Managed by the Navodaya Vidyalaya Samiti under the Ministry of Education, Government of India.

- Education is free, including boarding, lodging, uniforms, and textbooks. A nominal fee of around 600 per month is charged for boys in classes IX to XII, except for SC/ST students, girls, and students from families below the poverty line.

- There are JNVs in every district of Kerala.