Deanna Jump, a 43-year-old kindergarten teacher in Georgia, has unexpectedly become a self-made millionaire -- by selling her lesson plans to other teachers.

Like most teachers, Jump never really expected to rake in the cash, and she and her husband struggled to pay the bills while supporting their three children. But three years ago, a colleague who thought Jump's lesson plans were extremely effective encouraged Jump to share her lesson plans on TeachersPayTeachers.com.

The site was created by Paul Edelman in 2006. The former teacher, recognizing teachers' unforgiving hours and limited resources, wanted to offer educators a way to help each other -- and make money while sharing their ideas. TPT now allows educators to post original materials, allowing others to download the content for an average $4 per lesson, though prices vary "depending on the breadth and depth of the resource," and teacher-sellers determine their own pricing, Edelman told The Huffington Post.

About 1.1 million registered users are on the site, totaling about $14 million in earnings, CNN reports. Most teachers are paying for the lessons out of their own pockets.

Jump only made $300 the first year she was on TPT, but the popularity of her lessons grew -- she has sold 161,000 copies of her 93 separate units. In the last three months alone, Jump's TPT sales have totaled $213,000, Businessweek reports. She earns $55,000 annually from her full time teaching position at Central Fellowship Christian Academy.

Still, Jump is a TPT star, as no other user has experienced the same soaring success -- she's received inquiries from teachers around the world, from Spain to countries in Africa. But, Edelman tells Businessweek, at least two others have made $300,000 and 23 have topped $100,000 in earnings.

Other sites offering similar services are gaining traction. Udemy offers online services for anyone to give and take lessons, and boasts combined earnings of $1.6 million among its top 10 instructors from last year, according to TechCrunch. WeAreTeachers, an online teacher community, allows educators to communicate, collaborate and enter ideas to earn cash and prizes.

While Jump has faced some criticism, community support is prevalent.

"Regardless of who foots the bill for more-effective lesson plans, this sort of professional sharing is long overdue," Andrew Rotherham writes for TIME. "Too many teachers are on their own."

Jump says her TPT gig is like a second job, as it takes hours of work daily. With the money, she's sent her daughter to college, paid off her bills and gifted her quadriplegic brother with a handicapped-accessible van. Other than that, life's the same.

We really haven’t changed our lifestyle. I drive a Kia, okay?" She tells Businessweek. I’m just trying to keep it real.”

CORRECTION: A previous version of this story incorrectly stated the price of lessons on TeachersPayTeachers.com. The piece has been updated to reflect that the average price of lessons is $4, but can vary. We regret the error.

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  • School Supplies

    <strong>91 percent</strong> of teachers buy basic school supplies for their students.

  • Food

    <strong>2 in 3</strong> teachers <strong>(67%)</strong> purchase food or snacks to satisfy the basic nutritional needs of their students -- even ones who are already enrolled in their schools' free or reduced-price meal program.

  • Clothing

    <strong>1 in 3</strong> teachers purchase clothing for children, including jackets, hats and gloves <strong>(30%)</strong> or shoes and shoe laces <strong>(15%)</strong>.

  • Toothbrushes

    <strong>18 percent</strong> of teachers purchase personal care items, such as toothbrushes and sanitary products.

  • Hygiene Products

    Nearly <strong>1 in 3</strong> teachers <strong>(29%)</strong> purchase items such as toilet paper and soap that their school cannot provide enough of due to budget cuts.

  • Field Trips

    <strong>More than half</strong> of all teachers have paid the costs of field trips for students who couldn't afford to participate otherwise.

  • Alarm Clocks

    <strong>Several teachers</strong> reported purchasing alarm clocks for students. Due to work schedules or family circumstances, guardians were unable to wake their children for school, which led to absences and academic underperformance.