School field trips 2 Education, Secondary--20th century 1 Ethnic neighborhoods--Pennsylvania--Philadelphia--20th century 1 Female friendship--20th century 1 Historic sites 1 Liberty bonds 1 School field trips--Pennsylvania--20th century 1 more ... School yearbooks--20th century 1 Student activities--20th century 1 Students--Pennsylvania--Philadelphia--20th century 1 Teachers--Pennsylvania--Philadelphia--20th century 1 Women in education--20th century 1 less ...