Sandra Markle (born November 10, 1946, in Fostoria, Ohio)[1] is an American author of children's books.

Markle was born on November 10, 1946, in Fostoria, Ohio, to Robert and Dorothy (nee Sauler) Haldeman.

[1] Markle worked as an elementary and middle school teacher until 1979 at which time she started being a full-time writer.

Markle was chosen to journey to Antarctica in 1996 and 1998 as part of the National Science Foundation's Artists and Writers Program.

Its goal was to make science more interactive in order to improve student understanding of basic curriculum concepts.