Regular care and Teacher care

[Van]

Hi, Can someone explain to me what is Regular care and Teacher Care?
And do you renew your contracts in December and/or August? Why?

BTW, before I posted my questions, I tried to use Search and Advanced Search to search for similar topics, like the Regular & teacher care. The search options, couldn't find any related topics. :< Pls show me how to do it. Thx!

You can renew your contracts once a year and you decide when