Lesson Planning of Bar graph and Line Graph
Subject Mathematics
Grade 4^{th}
Students` Learning Outcomes
 Read and interpret simple bargraphs given in horizontal and vertical form.
 Read and interpret line graph.
Information for Teachers
 A visual way of recording information, a diagram or drawing representing a collection of data is known as graph. ‘Data means the information that is gathered by counting, measuring, asking questions or observing’.
 A graph using bars to show quantities or numbers so that they can be easily compared is called bargraph. A bargraph uses horizontal or vertical bars to represent data.
 In bargraphs, the widths of all bars are equal and draw at equal distance from each other.
 If the bars are along horizontal axis, then this graph is called “horizontal bargraph”.
 If the bars are reflected along vertical axis, then this graph is called “Vertical bargraph”
Horizontal BarGraph &
Vertical BarGraph
 In the line graph information are represented by “dots” joining with each other and it is used within period of time.
 In line graph information are continuously represented by dots and these dots are joined by the line segments which show the increase and decrease in the values.
Material / Resources
Writing board, chalk/marker, duster, prepared coloured charts / posters of bar and line graphs, textbook
Introduction
 Show posters or charts of horizontal and vertical bargraphs and line graphs to the students, like the following, as;
 Explain the data shown in these graphs.
Development
Activity 1

Activity 2

Sum up / Conclusion
 A visual way of recording information, a diagram or drawing representing a collection of data is known as graph. Data means the information that is gathered by counting, measuring, asking questions or observing.
 A graph using bars to show quantities or numbers so that they can be easily compared is called bargraph. A bargraph uses horizontal or vertical bars to represent data.
 If the bars are along horizontal axis, then this graph is called “Horizontal bargraph”.
 If the bars are reflected along vertical axis, then this graph is called “Vertical bargraph”
Assessment
 What is the purpose of graph?
 What is the difference between Bar and Line Graph?
 What is the difference between horizontal and vertical bargraph?
 Is width of bars of bar –graph equal?
Follow up
 Draw a graph between of 5 students` marks obtained in Mathematics, writing students` name on horizontal and their marks on vertical lines.
 Assign questions from the textbook.