From the info you've provided they seem to want to find a legal way to get rid of you for using sick-days. It's a thoroughly shitty attitude but it's fairly common. I've never heard of the multiple-week review but it sounds made-up (like they're trying to justify a non-renewal). In my experience here being accused of using the books too much really means stepping on the toes of your co-teacher who wants to use the book exclusively when they teach alone.If I were you I'd assume a non-renewal and plan accordingly.
It does sounds like your school wants to get rid of you. BUT this might not be a terrible situation. You can apply for a D-10 visa and get certified copies of your documents from the education office to use for a new job here locally. Seoul Global Center can help you navigate it. https://expatguidekorea.com/article/how-to-get-a-d10-job-seekers-visa-in-korea.html
I thought it was the culture to not be direct with you, (I often forget this beat around the bush culture here and am way too direct) hence why they are reviewing 3 weeks of classes etc so they can find fault with ONE teeny tiny thing and say no. They also do not like confrontation, so that could be why the long drawn out scenario. your spirit will have been worn down and you will not want to fight for the job. I'm also upset about their "concern" for your health. if you had been treated for the actual issue you wouldn't need to have taken time off and not felt good. I would think they would be concerned with the misdiagnosis and you getting better. I' m not looking forward to the forced appointment I have to have by the end of the year. I've read too many stories about terrible treatment and not being taken seriously.
I just found out all English teachers in the province are required a three-week teaching evaluation to see their teaching skills in cooperation with the homeroom teachers .... and my Korean English teacher said it's not supposed to affect me, but here we are with my job apparently on the line. So, yeah. I'm just going to gather all my paperwork because there is miscommunications everywhere and it's too dangerous to assume the better.
There's no need to be concerned for your health. A permanent Korean teacher going through cancer treatment or some other treatment wouldn't automatically lose their job. Why is it okay to turf the foreigner out, especially if your doctor could call them and tell them there is no more issue with you?
Which English teachers? Korean ones too? Also the last 3 weeks of your contract and not a couple of months ago where they could give you notice? If they tell you at the end you're non renewed, I really hope you scream in their face and make it uncomfortable for them. The reasons I mentioned above are reason enough to call them out. But, I guess play nice till then. Get your doctor to call your school and tell them you're cured if you are.
what province is this? I'm hoping it isn't mine, but it's most likely I am not renewing. Edit: and of course they tell you last minute, otherwise you could prepare.
Native english teachers have to be evaluated by homeroom teachers (while teaching WITH them) for the OE to see what the teaching skills are, etc. I don't think this is to weed out teachers ASAP. The korean teachers already did their evaluation I believe (my Korean English teacher also did his already). I'm not one to scream and shout when I'm angry - I'm more of a crying because of anger kind of girl so I'll just save my breath there.I wouldn't say I'm cured (doctor said the cyst could come back, or it could show up somewhere new and it's totally normal for women to get them), but recovery will take about 2 months. And you bet i'm doing my best during these two months to make sure i'm recovering.