In some cases, passing a drivers ed final exam can substitute for the written exam. No matter how the test is taken, students must pass with at least a 70% or higher, depending on that stateâs minimum. Once he or she passes, a teen driver will be issued a learners permit.
Learn how to protect your knees and reduce your risk of injury. The knee's vulnerability to injury depends on the strength of its neighboring muscles. A weak gluteus medius, or outer gluteal muscle, increases the chance of a knee injury by a factor of three. This muscle is critical for knee health, because it acts as a steering wheel for the entire leg.
A Tear in Your Cartilage. One of the most common reasons for knee buckling is a tear in the cartilage rings surrounding your knee, called the menisci. When your cartilage tears, you may find that your knee is unstable especially when going down the stairs or squatting down to pick something up.