From SFBC:
Brush up on your bike-to-school riding skills by taking this on-road practice ride with SF Bicycle Coalition staff and board. You and your children will be given tips on preparing for and riding to school, including some practice in a calm neighborhood and a ride on regular city streets with biking facilities.
Parents with children of all ages are welcome, including children riding independently. All people under 18 years of age must be accompanied by an adult. Please bring your own bikes and helmets. We leave promptly at 10AM. Rain cancels ride. Registration is not required, but it helps us in our planning.
NOTE: This ride leaves from TWO locations at 10AM on August 17th, choose between.