Find the probability of getting two heads when you toss a coin twice even if you don't have a penny! You can model what happens with a piece of rectangular paper.

Fold a sheet of paper in half lengthwise and mark on half "Heads" to represent obtaining a head on the first toss. Mark the other half "Tails." Fold the paper again. The creases in the paper should now divide it into four equal parts. One part should be labeled "Heads-Heads," one "Heads-Tails," one "Tails-Heads," and one "Tails-Tails." The probability of each outcome is represented by the portion of the paper it occupies.