Top-down view of unrecognizable college student sitting at desk in classroom, holding test sheet with A grade at daytime
Medium long of bearded male professor giving test sheets to students who sitting at desk in classroom on chemistry lesson in afternoon
Tracking of bearded male professor giving test sheets to multiethnic students who sitting at desk in classroom on chemistry lesson in afternoon
Medium of male Black and female Caucasian students in white gowns sitting at school desk in morning, getting test sheets on chemistry lesson
Close up of test tube and pipe for mixing solutions in laboratory on desk. Medical research equipment in glassware used on testing and chemistry experiment with microscope and computer
Midsection side view of person in white gown giving test sheets to two students who sitting at desk in classroom on chemistry lesson in afternoon, talking and smiling
Top-down view of cropped students in medical gowns sitting at school desk, talking chemistry exam in afternoon
Tilting down of male Biracial and female Black students in white gowns sitting at school desk in morning, writing test on chemistry lesson
Close up of 5th grade schoolboy writing at his desk in class
Close up of glassware for fluid solution or dna in laboratory on desk. Chemistry tray with sample test tubes for scientific experiment. Blood and liquid flasks prepared for analysis
Close-up of research scientist writing notes in chemistry laboratory. There are flasks, beakers and test-tubes on the table.
Chemistry lab experiment: Pouring red liquid, checking color change