In order to qualify for a license, a gym teacher must have a minimum of a bachelor's degree and pass competency examinations covering both general education and topics pertaining to their area of specialty. After a teacher is licensed, they must also meet continuing education requirements set by their state.
Mistake #3: Keeping mixed formula out too long. Formula that is sitting out at room temperature must be thrown away after 1 hour. If it is in the refrigerator, pre-mixed formula (also called ready-to-feed formula) that is opened must be thrown out after 48 hours. Formula that you mixed must be thrown out after 24 hours. Mistake #4: Re-using leftover formula.
Best Answer: So long as the vial has not been opened they will be good for a couple years past the expiration date. But the minute the vial is opened and the air gets in then they start to deteriorate. Some vials are labeled as good for 30 days, and some for 45, and still others for 90 days after opening. Read the accompanying info to see how long yours are good for after opening the vials. Source(s): Nana Lamb Â· 7 years ago.