Creating a working model to display various types of graphs (line graph, pie chart, histogram, pictograph) on a rotating sky wheel can be an engaging and interactive project for teaching mathematical concepts.

Here’s a step-by-step guide to help you build this model using cardboard, color paper, and chopsticks.

### Materials Needed:

**Cardboard**(for the wheel and base)**Color Paper**(for graphs and decoration)**Chopsticks**(for the rotating mechanism)**Glue or Hot Glue Gun**(for assembly)**Scissors and Cutter**(for cutting cardboard and color paper)**Markers or Paint**(for labeling and decoration)**Brass Fastener**(for the pivot point of the wheel)**Ruler and Compass**(for accurate measurements)

### Video Steps to Build the Types of Graphs Working Model:

**Create the Base:**- Cut a large rectangular piece of cardboard for the base. This will support the entire model.
- Cut two triangular supports from the cardboard and attach them vertically to the base using glue. Ensure they are positioned to hold the wheel in the middle.

**Create the Sky Wheel:**- Draw and cut out a large circle from the cardboard. This will be the sky wheel where the graphs will be displayed.
- Divide the circle into equal segments (like slices of a pie) to represent different types of graphs.

**Prepare the Graphs:****Line Graph:**Use color paper and markers to draw a line graph on one segment.**Pie Chart:**Cut pieces of color paper into wedges and glue them onto another segment to form a pie chart.**Histogram:**Draw and cut rectangular bars from color paper and arrange them on another segment to create a histogram.**Pictograph:**Draw symbols or shapes on color paper and arrange them in another segment to form a pictograph.- Decorate and label each segment accordingly.

**Attach the Graphs to the Wheel:**- Glue each graph to its respective segment on the sky wheel.
- Ensure all graphs are securely attached and neatly displayed.

**Create the Rotating Mechanism:**- Poke a hole in the center of the sky wheel and the top of the triangular supports on the base.
- Insert a brass fastener through the center of the wheel and the supports. This will act as the pivot point, allowing the wheel to rotate.
- Alternatively, you can use a chopstick as the axle. Push it through the holes in the wheel and supports and secure it with glue or rubber bands.

**Create Handles for Rotation:**- Attach a chopstick horizontally at the back of the wheel, securing it with glue. This will act as a handle to rotate the wheel.
- Ensure the wheel can rotate smoothly without obstruction.

**Decorate the Model:**- Use color paper and markers to decorate the base and supports.
- Add labels and instructions for each type of graph to make the model more informative.

This model will help illustrate various types of graphs in a fun and interactive way, enhancing the learning experience for students.