The best place to check is with the driver's ed teacher, if one exists. Even if your local school does not offer a driver's ed course, it may still have the materials available to you. Many schools teach driver's ed courses and, therefore, should have a variety of driver's ed practice tests available. In most cases this resource will probably only be helpful to current students, and may not be as useful to adults seeking driver's ed practice tests.
If the information you seek is not found at your local DMV office, or if you simply want more driver's ed practice tests, the next place you should look is at your local high school.