Mark a 3-inch space across the top of the poster board, using a ruler and a pencil. Underneath this space, lightly draw 10 straight lines -- separated by 1 to 2 inches -- down the poster board.
Number each line "1" through "10" with a marker. Using thick lines and various colors of markers to make it stand out, write the title of the rule chart in the 3-inch space at the top. Alternatively, draw an illustrative picture, such as a stop sign, to help the toddlers understand the rule chart.
Use a different color marker to write each rule on lines "1" through "10." Draw pictures to illustrate each rule. Depict a rule to share, for example, as two stick figures holding a toy together. Choose rules that relate to classroom activities and that promote good behavior.
Allow the marker writing to dry. Erase each pencil line from the poster board. Hang the chart in a prominent place in the toddler's classroom.