by Dan Tothero

Algebra I

Graphing Lines

Dan Tothero
To obtain a downloadable copy of the worksheet that accompanies this bulletin board, click on the button below.

TITLE: Walk The Line

SUBJECT: Algebra 1

TOPIC: Graphing Lines (Given the Linear Equation)

INTERACTIVITY: Students will be able to interact with this bulletin board by placing three paper lines of different colors onto the graph section of the board after they have been given the formulas for those lines (see directions). Once the students have placed the lines on the graph, they must copy the lines from the board onto their worksheet using the colored pencils found at the bulletin board station.



  1. Take a worksheet from the left bin under the bulletin board and follow the directions for obtaining three linear equations associated with your birth month.
  2. Carefully remove and place the colored lines on the graph according to the equations given in the previous segment.
  3. Copy the lines onto your worksheet using the appropriately colored pencil from the left bin (black, blue, or red).
  4. Place the lines in their original position underneath the graph and return the colored pencils to the left bin for the next student.
  5. Give completed worksheet to the teacher for extra credit points (3 per line).
  6. You have up to 5 minutes to complete this task.

Bulletin Board Rules:

  1. Be gentle with all of the movable items.
  2. Make sure to leave the board in the exact same way you found it so that the next person can complete the assigned tasks within the time limit.
  3. Do not attempt to copy other students’ work.
  4. Ask the teacher if you need additional help using this bulletin board or if there is a problem with one of the components.
  5. All items associated with this board (lines, pencils, and these instructions) may not be removed, except for your individual worksheet, which is to be handed in to the teacher.

TIME: Each student should be able to complete the activity in about 4-5 minutes.

SPECIAL CONSTRUCTION: The movable elements of this bulletin board are the three differently colored lines that are about 1 inch wide and 25 inches in length. Thinner pieces of paper may be too fragile. In addition, the movable lines are constructed out of several layers of poster board and covered with one layer of colored construction paper. The heavy duty construction is taken into consideration to ensure prevention of tears after multiple uses. In one school year the bulletin board may be used by more than 100 students, which essentially mandates durable construction.

CREDIT: Students will receive up to 9 points extra credit for this in-class activity if their answers are all correct. Each correctly drawn line is worth 3 points.

OTHER COMMENTS: Use of this bulletin board is intended to be during the work session of a math class. At this point, all of the students would be engaged in some type of problem solving activity. During the activity, students could be selected by the teacher to use the bulletin board one by one. All of the students in an average class could finish the bulletin board assignment during the course of a week.

It is also important to note that this bulletin board can be used only after students have had some sufficient instruction and practice dealing with the plotting of lines. The fractional slopes and y-intercepts in some of the equations may confuse newly oriented students.

Finally, the birth month system used to assign equations is a format that prevents students from deliberately copying answers from other students’ papers. With this format, each student is compelled to do his/her own work and to seek the only the teacher for clarification on any questions concerning bulletin board operation. After all, the activity is extra credit, so this assignment must be credited to the sole work of each individual.

Dan Tothero