Lesson Notes By Weeks and Term v3 - Primary 4
Data and Information
Download the Lessonotes Mobile Nigeria 2025 app for faster lesson access on Android and iPhone.
Data and Information
Download the Lessonotes Mobile Nigeria 2025 app for faster lesson access on Android and iPhone.
Subject: Information Technology (IT)
Class: Primary 4
Term: 3rd Term
Week: 8
Theme: Basic Computer Operations
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.
state the meaning of data and in for mation mention sources of in for mation describe computer as In put – Process - Out put (IPO) system list characters on the keyboard as data
A. Meaning of Data Definition: Data refers to raw facts, figures, symbols, or observations that have not been organized or processed to make them meaningful. On its own, data usually does not tell a complete story or provide immediate understanding.
Characteristics: Unorganized and unstructured. Can be numbers, letters, pictures, sounds, or videos. Does not convey a complete meaning or context by itself.
Examples relevant to Nigerian context: A student's name: "Chike" A student's age: "9" A student's score in a test: "75" The price of a bag of 'garri' in the market: "₦12,000" A list of items sold in a shop: "Yam", "Rice", "Beans", "Maggi" A list of phone numbers without names. A recording of a conversation without knowing who spoke or about what.
B. Meaning of Information Definition: Information is processed, organized, and structured data that becomes meaningful and useful. It provides context and answers questions, enabling understanding and decision-making.
Characteristics: Organized and structured. Meaningful and useful for understanding. Helps in making decisions. The result of processing raw data.
Examples relevant to Nigerian context: A class register: "Chike, Age 9, Grade Primary 4" (combines name, age, grade to give student profile).
A student's report card: "Chike scored 75 in IT. His overall performance is Good." (combines name, score, subject, and adds meaning).
A market price list: "Yam: ₦3,000 per tuber, Rice: ₦2,500 per 'congo', Garri: ₦12,000 per bag" (organizes prices with items for comparison).
A school timetable: "Monday: IT (9:00 - 9:40 AM), English (9:40 - 10:20 AM)" (structures subjects and times).
News broadcast on the radio: "Heavy rain expected in Lagos tomorrow" (processed weather data into a useful prediction). C. Relationship between Data and Information Data is the raw material, and information is the finished product. Data goes into a system, is processed, and then comes out as information.
This is often summarized as: Data -> Process -> Information. D. Sources of Information Information can be obtained from various places or methods.
These can be broadly categorized as: People: Teachers, parents, community elders, market traders, friends, doctors. (e.g., asking your father the history of your village).
Print Media: Books, textbooks, newspapers (e.g., The Guardian, Daily Trust), magazines, posters, flyers, school notebooks. (e.g., reading about current events in a newspaper).
Electronic Media: Radio (e.g., FRCN, private stations), Television (e.g., NTA, Channels TV), Internet (websites, blogs, social media), mobile phones, computers. (e.g., listening to news on the radio, watching a documentary on TV).
Physical Locations/Objects: Libraries, museums, hospitals, markets, schools, signs, labels on products. (e.g., finding a book in a school library, checking the ingredients label on a food item).
Observation: Directly seeing something happen. (e.g., watching a plant grow, observing traffic flow). E. Computer as an Input – Process - Output (IPO) System A computer is a machine that works by taking in data, doing something with it, and then giving out results. This is known as the Input-Process-Output (IPO) cycle.
1. Input: What it is: The stage where raw data is fed into the computer.
How it happens: Input devices are used to capture data and send it to the computer.
Examples of input devices: Keyboard: For typing letters, numbers, symbols (e.g., typing a student's name "Adanna").
Mouse: For clicking, pointing, selecting (e.g., selecting an option on a screen).
Microphone: For recording sounds or voices (e.g., recording a song).
Scanner: For converting images or documents into digital form (e.g., scanning a passport photograph).
Webcam: For capturing live video (e.g., making a video call).
Nigerian Context: A clerk in a local government office using a keyboard to input citizens' details for voter registration. A student using a microphone to record an oral presentation.
2. Process: What it is: The stage where the computer takes the input data and performs operations on it (e.g., calculations, sorting, organizing, comparing, storing). The Central Processing Unit (CPU) is the "brain" that does this work. * How it happens: The computer follows instructions (programs) scanning a passport photograph).
Webcam: For capturing live video (e.g., making a video call).
Nigerian Context: A clerk in a local government office using a keyboard to input citizens' details for voter registration. A student using a microphone to record an oral presentation.
2. Process: What it is: The stage where the computer takes the input data and performs operations on it (e.g., calculations, sorting, organizing, comparing, storing). The Central Processing Unit (CPU) is the "brain" that does this work.
How it happens: The computer follows instructions (programs) to transform the raw data into something meaningful.
Examples: Calculating the total marks of students. Arranging names alphabetically. Combining a student's name, age, and class to form a profile. Applying filters to a picture.
Nigerian Context: The school computer calculating the average scores for all Primary 4 students in I
T. A computer in a bank processing a customer's deposit transaction.
3. Output: What it is: The stage where the processed data (now information) is presented to the user.
How it happens: Output devices are used to display, print, or play the information.
Examples of output devices: Monitor/Screen: Displays text, images, videos (e.g., showing a class list on the screen).
Printer: Produces hard copies of documents (e.g., printing a student's report card).
Speakers/Headphones: Plays sounds, music, or speech (e.g., playing a recorded message).
Projector: Displays information onto a larger screen or wall.
Nigerian Context: A printed receipt from an ATM machine after a withdrawal. A news report displayed on a TV screen. A computer displaying the results of a market survey.
F. Characters on the Keyboard as Data Definition of Characters: Characters are the individual symbols, letters, numbers, and punctuation marks that can be typed using a keyboard.
Keyboard Layout: A standard computer keyboard has: Alphabetic keys: A-Z (e.g., 'A', 'b', 'd', 'p')
Numeric keys: 0-9 (e.g., '1', '5', '0')
Symbol keys: !, @, #, $, %, ^, &, , (, ), -, _, =, +, [, ], {, }, ;, :, ', ", ,, , /, ?, ~, ` (e.g., '@', '#', '?')
Special keys: Spacebar, Enter, Shift, Ctrl, Alt, Caps Lock, Tab, Backspace, Delete, Function keys (F1-F12).
How they become data: When a key is pressed, the character represented by that key is sent as raw data to the computer. The computer then processes this raw data (e.g., displays it on the screen, stores it in memory, uses it in a calculation). * Practical
Example: Typing "Lagos" on the keyboard. Each letter 'L', 'a', 'g', 'o', 's' is entered as individual data characters. When combined, they form the information "Lagos".
Materials: Chart showing definitions of Data and Information with examples. Chart illustrating the IPO cycle. Pictures or real-life examples of input/output devices (if available, a real computer and keyboard). Flashcards with examples of data and information (e.g., "Musa's age," "School Report Card"). Local newspapers, radio (if permissible), books.
A. Introduction (5 minutes)
Teacher Activity: Begins by asking students simple questions about information they receive daily. E.g., "How do you know what time school closes?", "How do you know your age?". Introduces the idea that we deal with facts and processed facts every day.
Student Activity: Students share how they know these facts, linking to common sources of information (parents, teachers, clocks).
B. Presentation of Content (20 minutes)
Teacher Activity: Data and Information: Using the chart, clearly define "Data" and "Information" with plenty of local examples (e.g., student names, scores, market prices for data; class register, report card, market price list for information). Uses flashcards to illustrate.
Sources of Information: Discusses various sources. Displays different materials like a newspaper, a book, and mentions radio/T
V. Asks students where they get news from.
Computer as IPO: Explains the IPO cycle using the dedicated chart. If a computer is available, demonstrates live how data is inputted (typing), processed (briefly explains what happens internally), and outputted (displayed on screen). Uses a simple example like typing their name and seeing it appear.
Keyboard Characters: Points to a real keyboard (or a large keyboard diagram) and asks students to identify letters, numbers, and symbols. Emphasizes that each key press sends a character as data.
Student Activity: Students define data and information in their own words after teacher explanation. Students identify data and information examples from flashcards or teacher's examples. Students list various sources of information they use daily. Students observe the IPO demonstration and identify the input, processing, and output stages. Students identify different characters (letters, numbers, symbols) on a keyboard.
C. Activity & Discussion (15 minutes)
Teacher Activity: Data vs.
Information Sort: Divides students into small groups. Gives each group a set of flashcards with mixed data and information examples. Instructs them to sort the cards into two piles: "Data" and "Information".
Sources Brainstorm: Leads a class discussion on where they found specific information (e.g., "How did you know there was a heavy rainfall forecast last night?"). Guides them to list different sources.
IPO Role-play: Assigns roles: some students act as "data," some as "input devices" (e.g., keyboard), some as "CPU" (processing), and some as "output devices" (e.g., monitor). Demonstrates a simple IPO scenario (e.g., "Inputting a student's score to get their grade").
Student Activity: Groups actively sort flashcards into "Data" and "Information" categories, discussing their choices. Students brainstorm and list various sources of information from their daily lives, explaining how they used them. Students participate in the IPO role-play, acting out the different stages and observing the process.
D. Conclusion (5 minutes)
Teacher Activity: Recaps the main points of the lesson, emphasizing the difference between data and information, the sources of information, and how computers process data using the IPO model. Assigns a simple take-home activity or revision task.
Student Activity: Students answer quick recap questions and note down any assignments.
Instructions for Teacher: Read out each question, allow students to think and answer individually or in pairs, then discuss the correct answer and explanation together.
Question 1: Look at the following items. Which one is data and which one is information? a) "Bayo's height: 1.2 meters" b) "1.2 meters" c) "List of all students' heights in Primary 4" Solution 1: a) "Bayo's height: 1.2 meters" - This is Information. It combines the raw fact "1.2 meters" with context ("Bayo's height"), making it meaningful. b) "1.2 meters" - This is Data. It's just a raw figure, without knowing whose height it is or what it represents. c) "List of all students' heights in Primary 4" - This is Information. It's an organized collection of heights, providing a complete picture for the class.
Commentary: This helps students distinguish between isolated facts and organized, contextualized facts.
Question 2: Mention two (2) sources where you can find out the latest news happening in Nigeria.
Solution 2: Newspapers: (e.g., The Punch, Vanguard)
Radio: (e.g., FRCN, state radio stations)
Television: (e.g., NTA, Channels Television)
Internet: (e.g., news websites, social media)
Family/Friends: (hearing news from people) (Teacher should accept any two relevant and correct sources. Emphasize Nigerian examples.)
Commentary: Reinforces the practical application of identifying information sources.
Question 3: Imagine you want to type your name, "Aisha," into a computer. Explain how the computer uses the Input-Process-Output (IPO) system for this task.
Solution 3: Input: You press the keys 'A', 'i', 's', 'h', 'a' on the keyboard. The keyboard sends these characters (data) into the computer.
Process: The computer's brain (CPU) receives these character data, recognizes them, and arranges them in the correct order. It prepares to display them.
Output: The computer sends the arranged characters ("Aisha") to the monitor/screen, and you see your name displayed.
Commentary: This provides a concrete, relatable example of the IPO cycle.
Question 4: List three (3) different characters you can find on a computer keyboard.
Solution 4: Any letter (e.g., 'A', 'p', 'z') Any number (e.g., '1', '7', '0') Any symbol (e.g., '@', '#', '!', '?') (Teacher should accept any three distinct characters from the keyboard.)
Commentary: Directly assesses the identification of keyboard characters as data.
School Records and Report Cards: Students can relate the concept of data to their own names, ages, and test scores (data). When these are combined, organized, and printed on a report card, they become meaningful information that parents and teachers use to assess progress and make decisions about their learning. This helps them understand the importance of accurate data collection in their school.
Market Transactions in Nigeria: In local markets, traders keep track of the prices of goods (e.g., yams, tomatoes, palm oil – this is data). When they calculate the total cost for a customer or create a price list for all items, this data is processed into useful information. This helps both the seller and buyer to understand the transaction and manage money effectively. Community Information and News Dissemination: Local communities rely on various sources for information. Community leaders, town criers, radio announcements, or local government circulars provide information on meetings, health campaigns (e.g., polio vaccination), or upcoming events. Raw observations or reports from community members (data) are compiled and delivered as useful information to the general public, helping them participate in community life. Students can connect this to how they hear news in their villages or towns.