male teacher with pointer

male teacher educator pointer blackboard classroom teaching educator work lesson delivery school teacher standing classroom instruction teaching tools plan method presentation academic environment setting profession role interaction teacher-student engagement professional material education preparation subject teacher#39aph39#s explanation focus blackboard standing action management teacher’s pointer stick communication activity guidance education authority demonstration overview subject matter expert role facilitation interactive task flow leadership interaction students relationship learning concept instructional technique explaining presence dynamic delivery educational presentation style influence approach space front gesture lecture discussion atmosphere