@James **************
it was easy enough to do ourselves.
Check if the school you are applying with is able to offer the Education and Guardian visa.
If so, the school will give you the paperwork from their side and with your required paperwork (birth certificates, passport, statements, etc) you are able to apply for the visa in your country - 90 days only.
One Guardian visa per one student.
Once entered Thailand you have to open a bank account and deposit into it 500K Baht. After about 2.5 months you can apply for the extension (again with all necessary paperwork)
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Good luck