Courses in a typical bachelor's degree program in education include student assessment methods, instructional strategies, multiculturalism and human development.
Electrolyte imbalance is the most common cause of leg vibration which is usually caused by dehydration.Drink plenty of fluids & take rehydration salt drinks.Stop the activity that caused the cramp.Gently stretch and massage the cramping muscle.If still the symptoms persists then you need to get tested for:
More than that may cause a vibration and/or tell you the bearing is failing. A sawtooth or heel-and-toe wear pattern on the tires can also produce vibrations and noise that may be speed sensitive. This type of wear is common on the rear tires of some front-wheel-drive cars, and may be caused by a toe-out condition on one or both rear wheels.