how to make a Double Bar Graph Model for maths exhibition

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In this video, you will learn how to make a Double Bar Graph Model for maths exhibition or school project. This model clearly shows comparison of marks in two different exams (Half-yearly vs Annual) using colorful bars, chart paper, and foam sheets.

Materials Needed

  • White chart paper (A3 size or large)
  • Cardboard sheet (base)
  • Foam sheet (green, blue, pink, red)
  • Colored sticks / straws / skewers (for bars)
  • Scale and pencil
  • Sketch pens
  • Fevicol / hot glue gun
  • Scissors
  • Black marker

Step-by-Step Procedure

STEP 1: Prepare the Base

  1. Take a strong cardboard sheet.
  2. Cover it with red chart/foam sheet (as shown in the picture).
  3. This becomes the foundation for the chart to stand.

STEP 2: Make the Main Graph Board

  1. Take a white chart paper and cut it into a rectangle.
  2. Draw horizontal ruled lines equally spaced (1 cm or 0.5 cm apart).
  3. Draw a vertical Y-axis on the left side.
  4. Draw a horizontal X-axis at the bottom.

STEP 3: Add Border

  1. Cut green foam sheet strips and stick around the edges of the board to make a neat border.

STEP 4: Label the Y-axis (Marks Obtained)

  1. Start from 0 at the bottom, then mark 5, 10, 15… up to 100.
  2. Write “Marks Obtained” vertically on a foam sheet piece and stick it on the left side.
  3. Draw an upward arrow at the top of the Y-axis.

STEP 5: Label the X-axis (Subjects)

  1. Prepare foam sheet rectangular pieces and write subject names, e.g.:
    • English
    • Maths
    • Science
    • Social
    • Hindi
  2. Stick them horizontally on the bottom of the board.

STEP 6: Draw the Scale Box

  1. Make a small box below the graph.
  2. Write:
    Scale: 1 Unit = 5 Marks

STEP 7: Prepare the Bars

You need two bars for each subject:

Bar 1 → Marks in Half Yearly (Blue)

Bar 2 → Marks in Annual (Pink)

You can use:

  • Colored sticks
  • Straws
  • Skewers painted with acrylic colors

Cut them to correct length based on marks.

Example:

  • If marks are 70, bar height = 70 ÷ 5 = 14 units (14 grid lines)

STEP 8: Paste the Bars

  1. Apply fevicol/hot glue at the bottom of each stick.
  2. Stick each bar exactly above its subject label.
  3. Keep equal spacing between the two bars of each subject.

STEP 9: Add the Main Title

  1. On a big foam sheet piece, write “DOUBLE BAR GRAPH”
  2. Stick it on the top center of the chart.

STEP 10: Add the Legends (Color Codes)

At the bottom:

  • Blue square → Marks in Half Year
  • Pink square → Marks in Annual

Stick the foam pieces and write the labels clearly.

STEP 11: Fix the Graph Board to the Base

  1. Apply hot glue at the bottom backside of the chart.
  2. Attach the board standing upright on the base.
  3. Support the back with a cardboard triangle if needed.

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