illustrated teacher's day chalkboard with a smiling teacher and colorful doodles

teacher classroom student 039 day chalkboard happy school education woman knowledge smiling learning professor chalk writing back training teaching educator educational young desk board tools mentor study children lesson academic blackboard lecture celebrate celebration explanation students world kids college background child book class learn teach pedagogy instructional illustration illustrated teacher#39aph39#s colorful doodles cheerful featuring front written bold surrounded creative playful decorations