For the USA, almost all teachers are certified teachers who get their certification through getting a degree in education, then taking certification tests. There are alternative paths that do not require the degree, where the school district will take on the responsibility for training you and helping you through the process.
But either way, you either need to seek out an education degree, or go to the HR page for your local school districts and look into their hiring process for alternative routes.
Also, if you want to teach part time, you are talking about being a substitute teacher, which are typically on-call positions with your local district.
For the USA, almost all teachers are certified teachers who get their certification through getting a degree in education, then taking certification tests. There are alternative paths that do not require the degree, where the school district will take on the responsibility for training you and helping you through the process.
But either way, you either need to seek out an education degree, or go to the HR page for your local school districts and look into their hiring process for alternative routes.
Also, if you want to teach part time, you are talking about being a substitute teacher, which are typically on-call positions with your local district.