Lesson Notes By Weeks and Term v5 - Grade 2

Lesson Video

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Performance objectives

• Collect data using questions and tally marks.
• Organise and show data using pictographs.
• Answer questions about data in pictographs.
• Use data to solve simple problems.

Lesson summary

Data handling is all about collecting, organising, and understanding information.

Think about it: we use information every day to make choices! Which is your favourite flavour of ice cream? Which game do most children in our class like to play? Data handling helps us answer these questions in a clear and organised way. In South Africa, understanding data is important for everything from knowing which fruits are most popular to helping plan how many textbooks a school needs. This week, we'll be revising data handling skills we've already touched upon, reinforcing our understanding, and getting ready for more complex data challenges!

Lesson notes

2. 1. Collecting Data Data collection involves gathering information about something.

We can collect data by: Asking questions (surveys): Asking people what they like or what they do.

Observing: Watching and counting things. We can use tally marks (||||) to quickly record our findings. Four lines and then a slash (||||/) represents five. This makes counting easier!

Example 1: Favourite Fruits Let's say we want to find out the favourite fruits of the children in our class. We can ask each student what their favourite fruit is and record it using tally marks. | Fruit | Tally Marks | Number of Children | | :------ | :---------- | :----------------- | | Apples | |||| / || | 7 | | Bananas | |||| / |||| / | 10 | | Oranges | |||| / | 6 | | Grapes | |||| | 4 | Explanation: We asked each child their favourite fruit. We used tally marks to keep track of the answers. We then counted the tally marks to find the total number of children who liked each fruit. 2.

2. Organising and Representing Data (Pictographs) A pictograph uses pictures to represent data. Each picture stands for a certain number of items. In Grade 2, we usually use one picture to represent one item.

Example 2: Using a Pictograph for Favourite Fruits Let's take the data from Example 1 and make a pictograph. We'll use a fruit icon (🍎 for apples, 🍌 for bananas, 🍊 for oranges, 🍇 for grapes) to represent each child's favourite fruit.

Title: Favourite Fruits of Grade 2 Learners | Fruit | Pictograph | | :------ | :-------------------------------------------------------------------------------------------------------- | | Apples | 🍎 🍎 🍎 🍎 🍎 🍎 🍎 | | Bananas | 🍌 🍌 🍌 🍌 🍌 🍌 🍌 🍌 🍌 🍌 | | Oranges | 🍊 🍊 🍊 🍊 🍊 🍊 | | Grapes | 🍇 🍇 🍇 🍇 | Key: 🍎 = 1 Apple, 🍌 = 1 Banana, 🍊 = 1 Orange, 🍇 = 1 Grape Explanation: Each picture represents one child who likes that fruit. The row with the most pictures shows the most popular fruit. The row with the fewest pictures shows the least popular fruit. 2.

3. Interpreting Data Interpreting data means understanding what the data tells us. We can ask questions about the data and answer them by looking at the pictograph or table.

Example 3: Answering Questions About the Pictograph Using the pictograph from Example 2, answer the following questions: Which is the most popular fruit? Bananas (because it has the most pictures). Which is the least popular fruit? Grapes (because it has the fewest pictures). How many children like apples? 7 children (because there are 7 apple pictures). How many more children like bananas than oranges? 4 children (10 banana pictures - 6 orange pictures = 4). 2.

4. Drawing Conclusions Drawing conclusions involves using the information to make statements or decisions.

Example 4: Drawing Conclusions about Fruit Choices We can conclude that bananas are the most popular fruit in Grade

2. If we were planning a class picnic, we might want to buy more bananas than any other fruit. Guided Practice (With Solutions)

Question 1: The Grade 2 learners voted for their favourite South African animal.

Here are the results: Elephant: |||| / || Lion: |||| Springbok: |||| / |||| / | Zebra: |||| / | Represent this data in a simple table showing the tally marks and the number of votes for each animal.

Solution: | Animal | Tally Marks | Number of Votes | | :-------- | :---------- | :-------------- | | Elephant | |||| / || | 7 | | Lion | |||| | 4 | | Springbok | |||| / |||| / | 11 | | Zebra | |||| / | | 6 |

Commentary: The table organizes the data clearly, making it easy to see the number of votes for each animal.

Question 2: Use the data from Question 1 to create a pictograph. Use an animal icon (e.g., 🐘 for Elephant, 🦁 for Lion, etc.).

Solution: Title: Favourite South African Animals of Grade 2 Learners | Animal | Pictograph | | :-------- | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Elephant | 🐘 🐘 🐘 🐘 🐘 🐘 🐘 | | Lion | 🦁 🦁 🦁 🦁 | | Springbok | 🦌 🦌 🦌 🦌 🦌 🦌 🦌 🦌 🦌 🦌 🦌 | | Zebra | 🦓 🦓 🦓 🦓 🦓 🦓 | Key: 🐘 = 1 Elephant vote, 🦁 = 1 Lion vote, 🦌 = 1 Springbok vote, 🦓 = 1 Zebra vote

Commentary: Each icon represents one vote. The pictograph visually displays the popularity of each animal.

Question 3: Using the pictograph from Question 2, answer the following questions: Which animal is the most popular? Which animal is the least popular? How many learners voted for the Zebra?

Solution: Most popular: Springbok Least popular: Lion Number of Zebra votes: 6

Commentary: Interpreting the pictograph allows us to answer questions and understand the data. Independent Practice (Questions Only) A Grade 2 class collected data on their favourite colours.

The results are: Red (8 votes), Blue (12 votes), Green (5 votes), Yellow (7 votes). Create a table to show this data. Using the data from question 1, create a pictograph. Choose a simple symbol (like a circle) to represent each vote. Look at your pictograph from question 2.