The following taken from http://www.union.edu
The Big Dipper is in the northern sky. It may look something like your momís gravy ladle. In the evening sky during autumn, the Big Dipper appears to be right side up, while in the spring-time evening sky, the dipper appears upside down. It is formed by seven stars – three form the dipper handle and four comprise the bowl of the dipper. The bowl of the Big Dipper looks somewhat like a square (actually a trapezoid) and is about 10 degrees across. You can measure this 10 degrees by making a fist and holding your fist up at armsí length against the sky. Your fist should appear to just fit inside the bowl of the Big Dipper. The Big Dipper is fairly easy to find because all of the stars comprising it are quite bright, except for the one which connects the handle to the bowl.
Now that you have located the Big Dipper, you can use it to find the North Star, Polaris, as well as other constellations. To find Polaris, locate the outer edge of the bowl of the Big Dipper (the side of the dipper furthest from the handle). The two stars on this outer edge are called the “Pointer Stars.” Starting from the Pointer Star at the bottom of the dipper and pretending to draw a straight line from it through the Pointer Star at the top of the bowl, continue drawing a line from the dipper bowl about five times as long as the distance between the two pointer stars, allowing your line to follow the curve of the sky slightly. At the end of your line, you will find Polaris, which is the brightest star in that region of the sky. If you are facing Polaris, you are facing north. Since Polaris remains at this location all year round, once you find Polaris, you know that East is on your right, South is behind you, and West is on your left.
Polaris is the last star in the handle of the constellation, or asterism, called the Little Dipper. The Little Dipper is more difficult to find than the Big Dipper because its stars are not as bright. Therefore, you may need a very dark, clear night to find the complete Little Dipper in the sky. The Little Dipper is smaller than the Big Dipper and its bowl hangs down from the handle.