Zoom in of female teacher explaining math formulas on chalkboard to diverse students during college lesson in classroom
Senior professor standing in front of students in classroom and explaining math formulas on chalkboard during lesson in high school
Biracial male student standing at lectern, pointing at math formulas on chalkboard, reading papers and speaking to group mates during lesson
Caucasian girl explaining math formulas on chalkboard to group of students and professor during university lesson
Low angle shot of African American professor standing by chalkboard with math formulas on it and explaining lesson in university
African American student teaching math formulas to classmates and professor in college lesson
Senior professor explaining graph on chalkboard during math lesson, then looking at camera and smiling while giving lesson to college students
Black male teacher in protective face mask standing by chalkboard in front of children in classroom, pointing at posters and explaining math lesson while working in school during covid-19 outbreak
Experienced professor teaching math to students in university classroom
African American professor pointing at graphs and formulas on blackboard and speaking to students while giving math lesson in university
Female Math Teacher With Board Room With Board To Write Math Formulas. She Holds Pen In Her Hand And Points It At The Board. Teacher Explains The Math. Woman Is Recording Video Lesson.