Abby and Brittany Hensel are conjoined twins who are employed as elementary school teachers.

The Hensel twins, who have been conjoined for their entire lives, have spent the past 10 years working as teachers following their graduation from university.

Abby and Brittany are conjoined twins, also known as dicephalic parapagus twins, characterized by the appearance of two heads and one body.

Dicephalic parapagus twins, such as Abby and Brittany, are a very rare condition, with only a few individuals surviving into adulthood. It is typically considered safer to not attempt separation of the twins.

Each woman has her own set of organs, including heart, stomach, spine, and lungs. They each control one arm and one leg of the conjoined body.

The sisters can independently perform tasks such as eating and writing, but tasks that require the use of multiple limbs simultaneously require coordination between the two.

Through cooperation, the sisters are able to drive a car, play the piano, ride a bike, participate in sports, and also work as teachers.

Due to the state of Minnesota's requirement, each sister holds her own driver's license and had to pass the test separately.

The sisters have made multiple television appearances, including on The Oprah Winfrey Show in 1996 and in documentaries such as Joined for Life and Joined at Birth.

The sisters have also been featured on the UK show Extraordinary People and had their own reality show on TLC called Abby & Brittany, which aired in 2012. The show followed the sisters as they graduated college and began their careers as teachers.

The sisters, who once had a reality TV show, currently lead a relatively private life as elementary school teachers.

Together, they teach fourth and fifth grade students with a focus on math, a position they have held since 2013.

Although they each hold their own teaching degree and license, when they were hired as teachers, Abby and Brittany were only paid one salary to be split between them, as they were considered to be "doing the job of one person."

Abby told the BBC in 2013: "As maybe experience comes in we'd like to negotiate a little bit, considering we have two degrees and because we are able to give two different perspectives or teach in two different ways."

"One can be teaching and one can be monitoring and answering questions," Brittany said. "So in that sense we can do more than one person."

Although they are conjoined, each sister has her own distinct style, which sometimes requires compromise. They see themselves as separate individuals.