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:
Steering vibration is almost always caused by the tires/wheels. Either your wheels are out of balance or one or both of your tires is defective. There could be a broken belt in the tire that is causing the vibration. If you don't want to take your vehicle to a tire store right away, you can check by reversing tires front to back.