Lesson Notes By Weeks and Term v5 - Grade 2

Lesson Video

This page supports the lesson note with a companion video and a short classroom-ready summary.

For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.

Performance objectives

• Collect data using tallies.
• Organize data in tables and pictographs.
• Answer questions about data using words like 'most' and 'least'.
• Revise addition, subtraction, and shapes.

Lesson summary

Data handling is all about collecting, organizing, and displaying information so we can easily understand it. It’s like being a detective and using clues (the data) to solve a mystery! In our everyday lives in South Africa, we use data all the time. For example, we can count how many red cars we see on the way to school, how many children in our class like pap and vleis, or what the most popular flavours of ice cream are at the tuck shop. This helps us make decisions and understand the world around us. This week, we'll be revising the data handling skills we've learned so far this term and applying them to new, exciting situations!

Lesson notes

What is Data? Data is just a fancy word for information. It can be numbers, words, pictures, or anything that tells us something. We collect data by counting, asking questions, or observing things around us.

Example: Let's say we want to know what everyone's favourite fruit is in our class. We can ask each learner and write down their answer. These answers are our data! Tally Charts A tally chart is a simple way to record data using tally marks. Each tally mark represents one item. We usually group tally marks in fives to make counting easier.

Example: Suppose we asked 10 learners which animal they like the most. Here's how we might record the data using a tally chart: | Animal | Tally Marks | Number | |---|---|---| | Lion | || 2 | | Elephant | IIII | 4 | | Zebra | III | 3 | | Giraffe | I | 1 | We make four vertical lines and cross them with the fifth line to make a group of five: `IIII`. This helps us count quickly! Pictographs A pictograph uses pictures or symbols to represent data. Each picture stands for a certain number of items.

Example: Let's show the same favourite animal data from the tally chart in a pictograph. We'll use a smiley face to represent one learner. | Animal | Pictograph | |---|---| | Lion | | | Elephant | | | Zebra | | | Giraffe | | _(

Note: Since the prompt restricts image use, represent smiley faces with text: 'image' )_ Important: Always include a key to show what each picture represents. In this case, each ` ` represents one learner. Tables A table is a way of organizing data using rows and columns. It's similar to a tally chart but usually includes numbers.

Example: Here's the favourite animal data presented in a table: | Animal | Number of Learners | |---|---| | Lion | 2 | | Elephant | 4 | | Zebra | 3 | | Giraffe | 1 | Interpreting Data Once we have collected and organized our data, we can interpret it to answer questions.

Most: Which animal do the most learners like? (Elephant)

Least: Which animal do the least learners like? (Giraffe) How many learners like lions and zebras? 2 (lions) + 3 (zebras) = 5 learners Revision of Addition and Subtraction: Data Handling often uses addition and subtraction, which we have learned before.

Example: How many more elephants are liked than giraffes? 4 (elephants) – 1 (giraffe) = 3 more elephants are liked.

Revision of Shapes: Tables and pictographs are often framed in squares and rectangles which are familiar 2-D shapes. Guided Practice (With Solutions)

Question 1: Thando collected data on his classmates' favourite colours.

Here is his tally chart: | Colour | Tally Marks | |---|---| | Red | IIII | | Blue | IIII I | | Green | III | | Yellow | II | How many learners like blue?

Solution: The tally chart shows `IIII I` for blue. That's 4 + 1 = 5 learners.

Question 2: Use the data from Question 1 to create a table showing the number of learners who like each colour.

Solution: | Colour | Number of Learners | |---|---| | Red | 4 | | Blue | 5 | | Green | 3 | | Yellow | 2 | Question 3: Using the table from Question 2, which colour is liked the least?

Solution: Looking at the table, yellow has the smallest number (2).

Therefore, yellow is the colour liked the least.

Question 4: Sipho counted the number of cars that passed his house in one hour. He counted 6 white cars, 3 red cars, and 2 blue cars. Create a pictograph showing this information. Use a car icon ` ` to represent each car.

Solution: | Colour | Pictograph | |---|---| | White | | | Red | | | Blue | | Key: Each ` ` represents one car. Independent Practice (Questions Only) Zanele asked her friends what their favourite sport is. 4 friends said soccer, 3 said netball, 2 said rugby, and 1 said cricket. Create a tally chart to show this data. Using the data from question 1, create a table showing the number of friends who like each sport. Using the table from question 2, which sport is the most popular? Using the table from question 2, how many more friends like soccer than netball? The grade 2 class voted for their class captain. Lindiwe got 8 votes, Sipho got 5 votes, and Thandi got 3 votes. Draw a pictograph to show this information. Use a ` ` to represent each vote. How many votes did Lindiwe and Thandi get in total? How many more votes did Lindiwe get than Sipho? What is the difference between the number of learners who voted for the most and the least popular candidate? Draw a rectangle. How many sides does it have? How many learners voted in total?