With an acceptance letter from an accredited Thai School or University you will be able to get a “Non-Immigrant ED” visa from a Thai Embassy or consulate abroad. Additionally, those wishing to participate in conferences or training seminars can also apply for the Non-Imm ED visa.
This visa will allow you to stay in Thailand for 1 year subject to one extension within the first 90 days. 90 day reports to Immigration are required and a re-entry permit is necessary should you wish to leave the country. A multiple re-entry permit allows for unlimited trips.