41-year-old high school teacher's side hustle brings in $3.8 million a year—he shares 'every high and every low' with st

Kevin Corey, a high school business teacher in New York, shares real-life lessons with students — including from Stall Mates, his own flushable wipes brand..

• Related Stories Kevin Corey spends his weekdays teaching high school students about real-world examples of the ups and downs of running a business, including his own side hustle
• Corey, 41, teaches business courses at Uniondale High School in Uniondale, New York
• He's also the co-founder and president of Stall Mates, a flushable bathroom wipes brand that brought in more than $3