A biology teacher in Holland has given her students a lesson they will never forget after she stripped off to show them her anatomy.

But it's not what you think. Dutch teacher Debby Heerkens was wearing a series of skintight suits showing muscular structure, internal organs and a skeleton.

The innovative teacher works at Groene Hart Rijnwoude school in the south of the country.

Teacher Debby Heerkens in class. All photos Groene Hart school via Facebook

Authorities at the progressive school took pictures of Debby's efforts before proudly sharing them on Facebook.