Armrests provided when tasks require the arms to be held away from the body. Chair height should allow thighs to be horizontal. Feet should be flat on the floor. Viewing angle at 40 degrees. Screen tilted back 10-20 degrees.
Elbows are parallel to keyboard.
Screen is 20-26 inches away. Teach students to keep wrists in neutral position when typing or using a mouse. Design Considerations for Computerized Workstations. The purpose of alternative keyboards. What the difference is between alternative and regular keyboards.