มัย - what does it mean? Today, one of my students wrote this on the board. It sounded the same as ไหม...it's the same? Or wrong spelling?

Could someone suggest me a thai children's program to help me remember basic vocabulary better? I am living in Thailand as a teacher, and I am noticing that I often forget very simple vocabulary words. It keeps me from communicating when I could otherwise say the sentence I want very well! Oh no!

First notebook entry: Introducing myself เรียนไทย สดในเมืองไทย จะไปAmericaสิบโมงเช้า ไม่เอาลืมภาษาไทย ขอช่วยครับ!