@James *******

appreciate that but after 3 years as a certified teacher if this school doesn't offer me a raise I'll be leaving.

I'd happily secure the job before quitting but there is inevitably a 3-4 month gap between the final semester of a government school and the new school year of an international school.

Despite those months between can I get an extension of my visa assuming my 'new school' vouches for me?

No idea how that type of thing works

I fully realize those months would be unemployed/unpaid

But with the contract signed with Aug/Sept start date