846-08226175

1950s WOMAN SITTING IN CLASSROOM OF EMPTY CHAIRS ANNOYED

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1960s SCIENTIST CONDUCTING A TITRATION EXPERIMENT

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1960s SMILING AFRICAN AMERICAN WOMAN TEACHER AT HER DESK HOLDING TEXTBOOKS LOOKING AT CAMERA

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1960s SAD DEPRESSED BUSINESSMAN WEARING DUNCE CAP

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1960s SCIENCE PROFESSOR WRITING A FORMULA FOR CHELATING AGENT ON CHALKBOARD

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1960s - 1970s MATURE WOMAN LOOKING OVER THE TOP OF HER EYEGLASSES FUNNY FACIAL EXPRESSION

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1960s SMILING MALE SCHOOL TEACHER SITTING AT DESK WEARING EYEGLASSES LOOKING AT CAMERA

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1960s ANGLED BACK VIEW OF CLASSROOM WITH TEACHER AT BLACKBOARD PLOTTING COMPLEX EQUATION IN GRAPH FORM

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1950s GIRL AT FRONT OF CLASSROOM USING POINTER TO READ THROUGH SCHOOL NEWS ON CHALKBOARD WITH TEACHER STANDING AT DESK

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1960s BACK VIEW OF CLASSROOM WITH TEACHER STANDING BEHIND DESK WITH BOOK IN HAND EXPLAINING GRAPHED EQUATION ON BLACKBOARD

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1960s PORTRAIT OF MAN BUSINESSMAN IN SUIT POINTING FINGER WITH STERN LOOK ON FACE

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1960s MAN TEACHER AT DESK IN CLASSROOM PENCIL PAPER IN FRONT BLACKBOARD BACKGROUND SMILING AT CAMERA

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846-02797017

1960s BLOND WOMAN SPEAKER STANDING BY TABLE PURSE GLOVES GLASS WATER HOLD OPEN BOOK READING SPEECH BUSINESS SUIT GLASSES

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1960s WOMAN ARCHED EYEBROWS POINTING HER FINGER AS WARNING WEARING STRIPED BLOUSE DARK CIRCLES UNDER HER EYES LOOKING AT CAMERA

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1950s - 1960s BLOND WOMAN STACK OF BOOKS IN HER LAP SHAKING FINGER POINTING

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1950s 1960s BRUNETTE WOMAN PEARL STRAND EARRINGS POINTING FINGER UP SPEAKING TALKING LOOKING AT CAMERA LECTURE TEACH NAG

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1950s WOMAN SITTING BETWEEN STACKS OF BOOKS PULLING DOWN GLASSES TO LOOK OVER RIMS

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1960s TEACHER WITH CLASS IN SCHOOLROOM WITH AUDIO VISUAL MACHINE EQUIPMENT

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1960s MAN STUDENT TEACHER POINT AT GLOBE AT DESK NOTEBOOK BOOK PAPERS WEAR SUIT & TIE CHALKBOARD STUDY HISTORY GEOGRAPHY

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846-02797024

1960s SIDE VIEW OF GRADE SCHOOL BOY AT DESK WRITING WITH TEACHER WRITING ON BLACKBOARD IN SOFT FOCUS IN BACKGROUND

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1960s BRUNETTE WOMAN WEARING EYEGLASSES READING BOOK

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1960s TEACHER AT BLACKBOARD WITH MALE & FEMALE STUDENT EXPLAINING MATH PROBLEM

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1960s TEACHER STUDENT CONFERENCE DESK TEEN MAPS HIGH SCHOOL MAN

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1960s BACK VIEW OF GRADE SCHOOL CLASSROOM WITH TEACHER AT FRONT WATCHING STUDENT WORKING ON BLACKBOARD

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1950s 1960s BRUNETTE WOMAN WEARING EYE GLASSES LOOKING UP WITH DOUBTFUL SKEPTICAL EXPRESSION LOOKING AT CAMERA

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1960s GROUP OF STUDENTS AROUND TABLE TEACHER STANDING BY MAP

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1960s PROFILE OF SCIENTIST MAN IN LAB COAT WRITING OUT CHEMICAL FORMULA ON BLACKBOARD

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1950s SMILING WOMAN SITTING IN CLASSROOM CHAIR WITH TEXTBOOK HOLDING GLASSES RESTING CHIN ON HAND LOOKING AT CAMERA

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846-05647473

1960s TEACHER AND STUDENT REVIEWING NOTES IN SCIENCE CLASSROOM

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1960s BLOND WOMAN SECRETARY TEACHER TAKING NOTES

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1960s MALE HANDS HOLDING EARTH GLOBE

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1960s SMILING MAN SITTING AT DESK WITH EARTH GLOBE

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1960s PORTRAIT MAN BUSINESSMAN SITTING AT DESK NEXT TO GLOBE OF THE EARTH

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1960s TEACHER SITTING AT DESK WITH BOY STUDENTS LOOKING AT AND GRADING PAPER INDOOR

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1960s UNHAPPY YOUNG MAN SITTING ON STOOL WEARING DUNCE CAP LOOKING AT CAMERA

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