The subject of a proposition (the «logical subject») is in a sense a really existing subject. (religion-online.org)
One of the reasons was to broaden existing subject faculty knowledge. (teachermagazine.com.au)
Speaking about Agricultural Literacy and Food System Education was Sue Knott of Minnesota Agriculture in the Classroom, an organization with a huge wealth of online resources for teachers to integrate nutrition education into existing subject areas. (beyondbreakfast.org)