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:
I have experienced the same since spring of 2007 - after negative testing for everything else, I had a positive Western blot test for Lyme disease. Infection with the Lyme bacteria can cause this sort of internal vibration-a type of paresthesia (peripheral nerve sensation).