Can I obtain a second education visa after having a 12-month one in Thailand?

You may be able to obtain another education visa after previously holding one for 12 months, but it largely depends on the specific school and the type of education you are pursuing. Generally, informal education programs, such as language or Muay Thai, might allow for a second year, while academic courses at reputable universities could also facilitate this process. However, if you're trying to apply for the same type of course again, you may need to wait five years unless you have a new passport that doesn't have the previous visa stamp. It's best to check directly with your school for guidance, as the Ministry of Education has rules against granting endless education visas.