PITTSBURG, Kan. (AP) — An incoming high school principal has resigned in Kansas after student reporters investigated and raised questions about her credentials.

The Pittsburg School Board accepted Amy Robertson's resignation on Tuesday, saying she felt the decision was "in the best interest of the district ... in light of the issues that arose."

The main concern stemmed from her receiving her master's and doctoral degrees from Corllins University, an unaccredited, online school. Robertson said she received her degrees before the university lost accreditation.

"She was going to be the head of o...