Threading different machines
Hello, I have a question. I am teaching a group of young ladies from my church how to sew on Saturday and we are borrowing machines from different people. My concern is threading all the different machines. I know that most modern Singers and Brothers will thread front to back, but is there a rule of thumb concerning other brands and/or older models, like Sew Mor, Kenmore, etc...? I hope this is clear. Thank you for your input.