The markers indicate the school, not the school forest location.
Tax -forfeit school owned – land deeded to the school district for the expressed purpose of maintaining a school sorest.
School owned - land owned by the school through purchase, donation or other acquisition.
JPA - land not school owned. Most often sites are county- or city- owned. These sites have a management or joint powers agreement (JPA) between the school and the landowner for use of the site for educational purposes.