Factor Facts

• Use yarn to connect the factors for a colorful effect.Jupiterimages/Polka Dot/Getty Images
  
  Seventh-grade students must show a strong understanding of factors on standardized tests. Begin by covering the board with inexpensive wrapping paper. Use large lettering to spell out "Factor Facts" at the top. Make a factor tree by writing the number 12 on the back of an index card. Use string to connect that index card to two cards below it labeled six and two. Again use string to connect the card with the six on it to two cards with three and two written on them. Show students that the factors of 12 are two, two and three. Add other clues to help students figure out factors at the bottom, such as any even number has a factor of two or any number that ends in five or zero has a factor of five. Make this board interactive by including additional index cards with various numbers in an envelope stapled to the board. Encourage students to substitute these cards by placing them in the factor tree.
  
  

Who Has the Power?

• Create an eye-catching scene with a hero on top of a skyscraper.Thomas Northcut/Photodisc/Getty Images
  
  Begin by covering the bulletin board with a blue paper. Create a skyscraper with three sheets of construction paper turned vertically. Draw windows using chalk. Use a printout or color a superhero to stand on top of the building. Add a cape made of fabric. Use large block letters for the title "Who Has the Power?" This board should consist of various tips about the power of numbers. For example, write, "Five to the second power is the same as five times five." Write multiple numbers on white paper and laminate them. Allow students to add problems to the board and work out the answer. Use hook-and-loop fasteners on the back of the numbers and on the board to make this interaction easier.
  
  

Stem and Leaf Plot

• Use a nature theme to display a stem and leaf plot.Jupiterimages/Brand X Pictures/Getty Images
  
  Demonstrate for students how easy it is to graph information using a stem and leaf plot. Begin with a title "Leave It Up to a Leaf." Paint a large sheet of newsprint brown. Twist this to resemble a tree trunk. Attach a sheet of paper that includes the information to be found on the stem and leaf plot. Write down each number in the 10s place. These should be attached to the trunk. Cut out leaves from green paper and attach these so that they extend from each 10s place. Give helpful hints to students, such as, "The stem should be the left side column with the 10s place. The leaves go on the right side and show a digit for each of the ones places." After several days, remove the leaves and ask students to plot their own graphs.
  
  

Probability

• Add excitment with a colorful bulletin board about probability.Barry Austin/Photodisc/Getty Images
  
  Build interest in the concept of probability. This board can also give students an idea of how casinos have a greater chance of winning than the players. At the top add the title, "Five Dollars on Black." Underneath the title, use a smaller font to pose the question, "What are the chances you can win when betting on black?" Show students how even though it appears to be a 50/50 chance of winning, the casino still has a better chance with the two green spaces. Create a roulette wheel using red and black paper with two spaces for the green squares. Ask students to figure out the chance of winning and post it on the board.