Can my child stay in Thailand while I switch language schools and obtain new visas for both of us?

As this thread has the potential to turn into a slow motion train wreck I will close it.

We wish good luck to the O/P and their child in the endeavor.. (y)

I closed commenting on this post as I wanted to message directly with the O/P. It turns out she and her child are indeed on extensions of stay as I surmised.

The other choice is for you to just enroll in and study at School A, allow the child to overstay and worry about it at another time.

As I said there is no negative repercussion for you or the child to have them overstay. I know foreigners with children here on multi-year overstays and there is no problem at all

Most likely neither of you are on any visas (Non-ED or Non-O 😮 ) anymore and you've been on yearly extensions

𝗜𝘀 𝗶𝘁 𝗽𝗼𝘀𝘀𝗶𝗯𝗹𝗲 𝘁𝗼 𝗼𝗯𝘁𝗮𝗶𝗻 𝗮 𝘃𝗶𝘀𝗮 𝗳𝗿𝗼𝗺 𝗦𝗰𝗵𝗼𝗼𝗹 𝗔 𝗮𝗻𝗱 𝗸𝗲𝗲𝗽 𝗺𝘆 𝗯𝗮𝗯𝘆 𝗵𝗲𝗿𝗲 𝘂𝗻𝘁𝗶𝗹 𝗦𝗲𝗽𝘁𝗲𝗺𝗯𝗲𝗿, 𝘁𝗵𝗲𝗻 𝗰𝗵𝗮𝗻𝗴𝗲 𝘁𝗼 𝗦𝗰𝗵𝗼𝗼𝗹 𝗕 𝗮𝗻𝗱 𝗴𝗲𝘁 𝘃𝗶𝘀𝗮𝘀 𝗳𝗼𝗿 𝗯𝗼𝘁𝗵 𝗼𝗳 𝘂𝘀?

You could but no your child cannot 😕

𝗪𝗵𝗮𝘁 𝗮𝗿𝗲 𝘁𝗵𝗲 𝗽𝗼𝘁𝗲𝗻𝘁𝗶𝗮𝗹 𝗰𝗼𝗻𝘀𝗲𝗾𝘂𝗲𝗻𝗰𝗲𝘀?

There is no problem just letting the child run on overstay when their current extension expires. Remember children under 15 can't be fined for overstay, and children under 18 can't be banned.

𝗪𝗶𝗹𝗹 𝗶𝗺𝗺𝗶𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝗶𝘀𝘀𝘂𝗲 𝗮 𝘃𝗶𝘀𝗮 𝗳𝗼𝗿 𝗺𝘆 𝗯𝗮𝗯𝘆 𝗴𝗶𝘃𝗲𝗻 𝘁𝗵𝗮𝘁 𝗶𝘁 𝘄𝗼𝘂𝗹𝗱 𝗯𝗲 𝗮𝗻 𝗶𝗹𝗹𝗲𝗴𝗮𝗹 𝘀𝘁𝗮𝘆 𝗳𝗼𝗿 𝘁𝗵𝗿𝗲𝗲 𝗺𝗼𝗻𝘁𝗵𝘀?

Nope, they will not. 😕 Once your child goes on overstay, you can't switch to an in country visa.

You'd have to bounce them out and back to get OFF the overstay and on to either a free stamp entry (if your nationality gets that) or buy a tourist visa for them from a nearby thai consulate (if they don' t get in free stamp) then apply for the in country visa based on being the child of a foreigner legally here on an ED visa