Here is a step-by-step guide to using this lesson plan in the classroom/laboratory. We have suggested these steps as a possible plan of action. You may customize the lesson plan according to your preferences and requirements.

1.Topic introduction and discussion

Teaching Module(~8-12 min)

Use the tool, ‘Representing Data’ by Khan Academy to introduce the concept of a data set to your students.

Further, explain how this data can be sorted and represented in tabular form, bar-graphs, line graphs and so on.

Explain how the represented data can then be interpreted by asking relevant questions.

Use the given practice set of questions to reinforce these concepts.

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2. Further their understanding of data representation using bar graphs

Teaching Module (10 – 15 min)

Use the teaching module, ‘Creating a bar graph’ by Khan Academy to describe how bar graphs are constructed to represent data.

Navigate to the following tabs- ‘Reading Bar graphs’ and ‘Interpreting Bar graphs’ to enable your students to understand how bar graphs are used.

Use the practice set of questions within the teaching module to allow students to apply their understanding of these concepts.

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3. Classroom Activity: Constructing bar graphs using climate data

Classroom Activity(~10-20 min)

A) Use the website of the Indian Meteorological Department (IMD)

B) Instructions to obtain climate data for Indian cities:

1. Enter the name of the chosen city in the filter for ‘City Weather’ to obtain the current weather report.
2. Click the tab, ‘Extreme and Climatological Information’ at the bottom of this webpage to obtain datasets for ‘Extreme Weather Events in the Current Month’ in the past 10 years, and a climate dataset for a 30-year period.

C) Conduct the activity with the data obtained as follows:

1. Use the ‘Climatological Table’ on the webpage to make bar graphs of:
2. Daily Maximum temperature (y-axis) versus months of the year (x-axis) and
3. Mean Total Rainfall in mm (y-axis) versus months of the year (x-axis)
4. A simple how-to video guide on making bar graphs using climate

5. These graphs will allow your students to understand the annual weather patterns in different Indian cities.
6. Explain what the data ranges are for both weather parameters. You can use these representations to describe the climate of a city.
7. Now, use the data for a particular month eg. September, as a baseline and plot the corresponding data points (Maximum temperature and 24 Hours Highest Rainfall from ‘Extreme weather events’ table) for the past 10 years.
8. Describe the data range, which is the variation of these weather parameters from the climatological baseline conditions.
9. Facilitate a classroom discussion on any weather extreme events and the possibility of it being linked to climate change.

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4. Questions/Assignments

• Learn the definition of trigonometric functions.
• Use trigonometric functions to relate the lengths of the sides of a right-angled triangle.
• Apply trigonometry to understand why even a small sea level rise due to global warming can affect coastlines.

Use this lesson plan to help your students find answers to:

1. What is data and how can it be represented?
2. What is the data range of a given dataset?
3. What is the temperature and precipitation range of a city for a selected month over a 10-year period?
4. Does the climate data from your hometown show extreme weather conditions that may be linked to climate change?