Start at TOS parking, take Red/White from Parking to Cannonball, take a right on Cannonball and then cross over Skyline going north. You will soon join yellow. Thus you are on Cannonball and Yellow. When they split, stick with Yellow. Shortly thereafter you will have the chance to split left onto Ringwood/Ramapo trail (red). Take this all the way to the school. Technically, it does not reach the school, but if you look at the attached map, you will see that as you get close to the end - just don't turn off onto the dotted section (it is hiker only anyway) and you will go straight down and see the school off to your left.