Lesson Notes By Weeks and Term v5 - Grade 1

Lesson Video

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Performance objectives

• Collect simple data using tally marks.
• Organise data into simple pictographs.
• Answer questions about data in a pictograph.
• Revise number recognition and ordering up to 20.
• Revise simple addition and subtraction within 10.

Lesson summary

Data handling is all about collecting information, organising it, and then making sense of it. In Grade 1, we start with very simple data, like the number of learners who like different fruits or the colours of cars we see outside our classroom. Understanding data helps us answer questions about the world around us. For example, which is the most popular snack in our class? How many more girls than boys are there? These are questions data can help us answer! This week, we also revise previously learned concepts to solidify our understanding.

Lesson notes

2.1 Data Collection and Tally Marks: Data is information! We collect data by asking questions or observing things. Tally marks are a quick and easy way to keep track of the information we collect. Each item is represented by a single stroke: |. When we reach five, we draw a diagonal line across the four strokes to make a group: ||||. This group of five makes it easier to count larger numbers.

Example: Let's say we're collecting data on favourite fruits.

We ask 10 learners: Apples: | | | Bananas: | | | | | Oranges: | | This shows that 3 learners like apples, 5 learners like bananas, and 2 learners like oranges. 2.2 Pictographs: A pictograph is a way to show data using pictures. Each picture represents one item. Pictographs are easy to understand because they use visual symbols.

Example: Let's use the favourite fruit data to create a pictograph. We'll use a picture of each fruit to represent a learner who likes that fruit. | Fruit | Pictograph | | :-------- | :------------------------------------------ | | Apples | 🍎 🍎 🍎 | | Bananas | 🍌 🍌 🍌 🍌 🍌 | | Oranges | 🍊 🍊 | Explanation: Each 🍎 represents one learner who likes apples. There are 3 apples, so 3 learners like apples. Each 🍌 represents one learner who likes bananas. There are 5 bananas, so 5 learners like bananas. Each 🍊 represents one learner who likes oranges. There are 2 oranges, so 2 learners like oranges. 2.3 Answering Questions using Pictographs: Once we have a pictograph, we can answer questions about the data.

Example: Using the fruit pictograph: Which fruit is the most popular? Bananas (because it has the most pictures). How many learners like apples? 3 (because there are 3 apple pictures). Do more learners like apples or oranges? Apples (3 is more than 2). 2.4 Revision of Number Recognition and Ordering: Remember our numbers! We've been learning to count and recognize numbers up to

2

0. We can also put them in order from smallest to largest.

Example: Let's put these numbers in order: 7, 12, 3, 18, 5 Smallest to largest: 3, 5, 7, 12, 18 2.5 Revision of Simple Addition and Subtraction within 10: We've also been learning to add and subtract. Remember, adding means putting things together, and subtracting means taking things away. We can use our fingers, counters, or drawings to help us.

Example: 3 + 2 = ? (We can use 3 fingers on one hand and 2 on the other.

Then count all the fingers: 5) 7 - 4 = ? (We can start with 7 fingers and then put 4 down. How many are left? 3) Guided Practice (With Solutions)

Question 1: Collect data on the favourite colours of 5 learners. Use tally marks to record the data. The choices are red, blue, and green.

Solution: Let's say we collected the following data: Red: | | Blue: | | | Green: | Explanation: Two learners chose red, three chose blue and one chose green.

Question 2: Use the data from Question 1 to create a pictograph. Use a coloured square (🟥, 🟦, 🟩) to represent each learner's favourite colour.

Solution: | Colour | Pictograph | | :----- | :--------- | | Red | 🟥 🟥 | | Blue | 🟦 🟦 🟦 | | Green | 🟩 | Explanation: Each coloured square represents one learner who chose that colour as their favourite.

Question 3: Look at the pictograph from Question

2. Which colour is the most popular? How many learners like green?

Solution: The most popular colour is blue. One learner likes green.

Explanation: We can see from the pictograph that blue has the most squares, meaning it's the most popular. There is only one green square, so only one learner likes green.

Question 4: What number comes after 14?

Solution: 15 Explanation: Counting up from 14, the next number is

1

5. Question 5: Solve: 6 - 2 = ? Use your fingers to help.

Solution: 4 Explanation: Start with 6 fingers. Put 2 fingers down. You have 4 fingers remaining. Independent Practice (Questions Only) Collect data on the favourite animals of 6 learners. Use tally marks. The choices are dog, cat, and bird. Use the data from Question 1 to create a pictograph. Use a picture of each animal (🐶, 🐱, 🐦) to represent each learner's favourite. Look at the pictograph from Question

2. Which animal is the least popular? How many learners like dogs? Write these numbers in order from smallest to largest: 9, 16, 2, 11, 6 What number comes before 8?

Solve: 4 + 3 = ?

Solve: 9 - 5 = ? Thando has 5 sweets. She gives 2 to her friend. How many sweets does Thando have left? Draw a pictograph to represent the following data about the weather: Sunny - 4 days; Cloudy - 2 days; Rainy - 1 day. Use a sun, cloud, and raindrops as your symbols. Write down the numbers between 10 and 15.