What are some affordable international or language schools in Thailand that assist with student visas?

Several users recommend affordable international and language schools for international students in Thailand. Pro-language school is noted as cheaper than ABAC, while Duke Language School offers full-time enrollment and is recognized for sending progress reports to immigration, aiding in visa extensions every three months. It is important to note that students must demonstrate progress in their language skills during immigration interviews for visa renewals. Other schools mentioned include ALA and Rak Thai.