Nursing students in lecture hall

1270 × 1750

Man in wind tunnel with airplane

1200 × 848

Cadet on wooden horse

1048 × 1935

Soldiers resting on a city sidewalk

2300 × 1642

Hospital ward during Civil War

1300 × 1014

Rehabilitation therapy session

1536 × 1217

Nurses with patient on stretcher

4096 × 3316

Students in a lecture hall

1250 × 833

Students taking a test

1600 × 1000

Professor teaching in a lecture hall

1920 × 1080

Professor teaching in a lecture hall

1600 × 1200

Professor teaching in a lecture hall

1680 × 1050

Professor teaching in a lecture hall

1920 × 1060

Professor teaching in a lecture hall

1600 × 900

Students in a classroom

1229 × 900

Boxer training with a speed bag

2692 × 4048

U.S. Army training aircraft in flight

1425 × 1133

Historic schoolroom interior

1600 × 1200

Abandoned classroom with chalkboard

1719 × 1200

Nikola Tesla with electrical discharge

1417 × 938