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.
Here are some basic things you need to do to store formula correctly and safely. Store unopened containers at room temperature and avoid extreme storage temperatures. Use formula by the expiration date. All prepared formula should be fed immediately, or refrigerated and fed to your baby within 24 hours. Discard formula that your baby has not consumed within one hour.