Draw 29 slashes for each slice on the outer edge of the circle (or you could just do 5 slashes and have each represent 5 degrees). Each slice contains 30 degrees, so it's like each slice is then sliced into 30 more slices. Label each slice counterclockwise (left to right) with each zodiac sign in order, Aries through Pisces (so Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, Pisces). Each 'slice' contains each sign of the zodiac. Make the lines either bold or in a different color from what you'll do next. Draw lines through the circle like you would cut a pizza, and make 12 even 'slices'. Take a plain piece of paper and draw a circle on it as best you can (or just trace something circular, or use a compass). If you're completely new to astrology, it's one of the first things you must learn.
This is a totally basic exercise and shows you how to count degrees and therefore helps you find aspects and understand the zodiac wheel. You do them so often, they become second nature, and you forget that you need to learn these things first before you start anything else. Sometimes astrologers forget when teaching someone new to astrology the absolute basics required to learn.