Must have the ability to stand for extended periods of time; exhibit manual dexterity to dial a telephone; see and read a computer screen as well as printed materials with or without vision aids; hear and understand speech at normal levels, outdoors and on the telephone; speak in audible tones so that others may understand clearly; physical agility to lift up to 25 pounds to shoulder height and 50 pounds to waist height; and to bend, to stoop, to sit on the floor, to climb stairs, to walk and to reach overhead. While performing the duties of this job, the employee may occasionally work in outside weather conditions and be exposed to wet and/or humid conditions, temperature fluctuations, fumes or airborne particles, toxic or caustic chemicals commonly used in instruction and/or cleaning.