Operating Systems and File Management
What is an Operating System; Functions of an Operating System; Graphical and Command-Line Interfaces; Files, Folders and Drives; File Management Skills
On this page8 sections
- 01Learning Objectives
- 02What is an Operating System
- 03Functions of an Operating System
- 04Graphical and Command-Line Interfaces
- 05Files, Folders and Drives
- 06File Management Skills
- 07Practical Work
- 08Scenario-Based Questions
Learning Objectives
- Define an operating system and state its functions.
- Compare a graphical user interface and a command-line interface.
- Explain files, folders and drives.
- Practise good file management skills.
What is an Operating System
An operating system is the most important piece of system software on a computer. It is the first program to load when the computer is switched on, and it manages all the hardware and software resources of the computer.
Common operating systems are Windows, used on most desktop and laptop computers; macOS, used on Apple computers; Linux, which is free and open source; Android, used on many phones and tablets; and iOS, used on iPhones and iPads.
Functions of an Operating System
The operating system manages hardware by communicating with the keyboard, mouse, monitor, printer and other devices. It manages memory by deciding which programs use the RAM and how much each one gets. It manages files and folders by keeping track of where everything is stored.
It provides a user interface so that a person can control the computer. It manages programs by loading them, running them and closing them, and it reports errors when something goes wrong.
Graphical and Command-Line Interfaces
A graphical user interface, or GUI, lets the user interact using pictures called icons, windows and menus with the mouse. Most people use a GUI because it is easy to learn.
A command-line interface, or CLI, requires the user to type text commands. On Windows it is opened through the Command Prompt, and on Linux and macOS it is called the Terminal. A CLI is faster for experts but harder for beginners.
Files, Folders and Drives
A file is a named collection of data stored on a computer. Every file has a name and an extension that shows its type. For example, essay.docx is a document and photo.jpg is a picture. The extension tells the operating system which program to use to open the file.
A folder, also called a directory, is a container used to organise files. Folders can hold other folders, called sub-folders, giving a tree of folders. A drive is a storage area such as the C drive. A USB flash drive may be labelled D or E.
File extension means the part of a file name after the dot that shows its type.
File Management Skills
Good file management makes work easy to find. Use clear, descriptive names instead of names like Document1. For example, save a file as JSS2 Science Essay Week3. Save each file in the correct folder, and save your work often using Ctrl and S.
To create a folder, right-click on an empty area, choose New and then Folder. To rename, right-click and choose Rename. To move a file, drag it to the new folder. To copy it, hold Ctrl while dragging. Deleted files go to the Recycle Bin and can be restored until the bin is emptied.
| Operating system | Made by | Where it is used |
|---|---|---|
| Windows 10 and 11 | Microsoft | Desktops, laptops, schools, offices |
| macOS | Apple | MacBook and iMac computers |
| Linux | Community | Schools, servers, developers |
| Android | Smartphones and tablets | |
| iOS | Apple | iPhone and iPad |
| Feature | GUI | CLI |
|---|---|---|
| Interaction | Clicking icons and menus | Typing text commands |
| Ease of use | Easy for beginners | Hard for beginners, fast for experts |
| Uses pictures | Yes | No, text only |
| Memory used | More | Less |
| Task | Steps |
|---|---|
| Create a folder | Right-click, New, Folder, type the name, Enter |
| Rename a file | Right-click, Rename, type the name, Enter |
| Move a file | Drag the file to the new folder |
| Copy a file | Hold Ctrl and drag, or Copy and then Paste |
| Delete a file | Right-click and Delete, or drag to the Recycle Bin |
Practical Work
- Create a folder called School Work on the desktop, then create three sub-folders inside it.
- Rename one file correctly, move a file into a folder and copy a file to a flash drive.
- Delete a file, then restore it from the Recycle Bin.
- Open the Command Prompt and type dir to list the files in a folder.
Scenario-Based Questions
- Emeka saves his project as Document1 on the desktop. Two weeks later he cannot remember what it contains. What naming mistake did he make, and how should he have saved the file?
- Kemi wants to keep her schoolwork organised. Describe the steps to create a folder called Science Project on the main hard drive.
- Amina finishes a poster and wants a copy on her flash drive while the original stays on the desktop. Should she copy or move the file? Explain.
- Tunde deletes a report by mistake. Where can he look before the file is permanently lost, and how does the Recycle Bin work?
- Chidi is typing a long essay when the power goes off and he had not saved. Explain why saving often matters and give the keyboard shortcut he could have used.
- Fatima downloads a file called report.pdf and it opens in the wrong program. Using file extensions, explain why this happened and how to fix it.
- Explain two differences between a graphical user interface and a command-line interface.
LEARNING OBJECTIVES: BY THE END OF THE LESSON PUPILS SHOULD BE ABLE TO:
| Cognitive | i. Define an operating system and state its functions. ii. Compare a graphical user interface and a command-line interface. iii. Explain files, folders and drives. iv. Practise good file management skills. |
| Affective | i. Appreciate the value of Operating Systems and File Management in school, at home and in the community. ii. Show willingness to use digital tools carefully, safely and responsibly. |
| Psychomotor | i. Create a folder called School Work on the desktop, then create three sub-folders inside it. ii. Rename one file correctly, move a file into a folder and copy a file to a flash drive. iii. Delete a file, then restore it from the Recycle Bin. iv. Open the Command Prompt and type dir to list the files in a folder. |
Rationale: An operating system is the most important piece of system software on a computer. Understanding what is an Operating System, functions of an Operating System, graphical and Command-Line Interfaces, files, Folders and Drives helps learners use digital technology confidently, safely and responsibly.
Pre-requisite Knowledge: In Week 2, learners studied Computer System: Hardware, Software and Peopleware, including what is a Computer System, hardware: The Physical Parts, software: The Instructions. The knowledge from that week is used again in this lesson.
Learning Material/Teaching Aid: Whiteboard, markers, computer or laptop where available, printed notes and charts on Operating Systems and File Management, practical task sheets, learners' notebooks and pens.
Reference Materials: Digital Technology for Junior Secondary Schools (JSS 2); NERDC Digital Technology Curriculum; Digital Technology JSS 2 First Term Notes (Week 3); First Term examination and Continuous Assessment question papers.
LESSON DEVELOPMENT
| Stage/Step (Time) | Teacher's Activities | Student's Activities | Learning Points |
|---|---|---|---|
| Introduction 5 MINUTES | Welcomes learners, revises Week 2 (Computer System: Hardware, Software and Peopleware) with two quick oral questions, and asks what they already know about Operating Systems and File Management. Elicits responses and writes the topic on the board. | Recall the previous lesson and share what they already know about Operating Systems and File Management. | Connecting prior knowledge to Operating Systems and File Management. |
| Step 1 6 MINUTES | Covers What is an Operating System: An operating system is the most important piece of system software on a computer. It is the first program to load when the computer is switched on, and it manages all the hardware and software resources of the computer. Covers Functions of an Operating System: The operating system manages hardware by communicating with the keyboard, mouse, monitor, printer and other devices. It manages memory by deciding which programs use the RAM and how much each one gets. | Listen, take notes and answer oral questions on "What is an Operating System" and related points. | Understanding: What is an Operating System; Functions of an Operating System. |
| Step 2 6 MINUTES | Covers Graphical and Command-Line Interfaces: A graphical user interface, or GUI, lets the user interact using pictures called icons, windows and menus with the mouse. Most people use a GUI because it is easy to learn. | Copy the key points, give examples from school and everyday life, and ask questions on "Graphical and Command-Line Interfaces". | Understanding: Graphical and Command-Line Interfaces. |
| Step 3 6 MINUTES | Covers Files, Folders and Drives: A file is a named collection of data stored on a computer. Every file has a name and an extension that shows its type. For example, essay.docx is a document and photo.jpg is a picture. | Discuss in pairs, then report one point on "Files, Folders and Drives" to the class. | Understanding: Files, Folders and Drives. |
| Step 4 6 MINUTES | Covers File Management Skills: Good file management makes work easy to find. Use clear, descriptive names instead of names like Document1. For example, save a file as JSS2 Science Essay Week3. | Respond to questions, complete the examples on the board and note down "File Management Skills". | Understanding: File Management Skills. |
| Practical Work 6 MINUTES | Guides learners through the practical work: (i) Create a folder called School Work on the desktop, then create three sub-folders inside it. (ii) Rename one file correctly, move a file into a folder and copy a file to a flash drive. (iii) Delete a file, then restore it from the Recycle Bin. Moves round the class to check progress and correct unsafe or careless use. | Carry out the practical tasks individually or in pairs and record what they did in their notebooks. | Applying the lesson through hands-on practice. |
| Evaluation 3 MINUTES | Asks learners to: i. Define an operating system and state its functions. ii. Compare a graphical user interface and a command-line interface. iii. Explain files, folders and drives. iv. Practise good file management skills. | Respond verbally and in writing to the evaluation questions. | Assessment and consolidation of the lesson content. |
| Conclusion 2 MINUTES | Recaps the main points: what is an Operating System, functions of an Operating System, graphical and Command-Line Interfaces, files, Folders and Drives, file Management Skills. Links them to the assignment and previews Week 4: Computer Networks. | Listen, ask questions and copy the assignment. | Reinforcement of key concepts and a preview of the next lesson. |
Assignment: i. Emeka saves his project as Document1 on the desktop. Two weeks later he cannot remember what it contains. What naming mistake did he make, and how should he have saved the file? ii. Kemi wants to keep her schoolwork organised. Describe the steps to create a folder called Science Project on the main hard drive.
On this page9 sections
- 01Lesson objectives
- 02Key vocabulary
- 03Common misconceptions
- 04Teacher activities
- 05Student activities
- 06Practical / learning evidence
- 07Resources and preparation
- 08Assessment for learning
- 09Inclusion and homework
Lesson objectives
By the end of the week, learners should be able to:
- Explain why file management matters in a multi-user laboratory.
- Describe the operating-system functions for files, folders, users and programmes.
- Organise a school drive into subject, term and week folders.
- Create a file and apply a clear name with correct casing.
- Locate a file by searching the directory tree.
Key vocabulary
- File management: the process of creating, naming, moving, copying and deleting files and folders.
- Operating system: software that manages hardware, files, users and running programmes.
- Directory tree: the visual map of folders and subfolders.
- Subject folder: a folder holding work for one subject.
- Term folder: a folder holding work for one term.
- File name: the label identifying a stored file.
- Search: finding a file by name or content within the directory tree.
Common misconceptions
- "Folders mean nothing in a networked laboratory." Folders prevent cross-contamination between users.
- "Saving the wrong folder discards the work." Saving to the wrong folder gives a fresh copy, not an erasure.
- "Renaming a file breaks the link to its content." Renaming changes the name only; the file remains accessible.
Teacher activities
- Starter: show two drives with mislabelled files and ask why one would waste time finding work.
- Explain file management by comparing two incorrect filing schemes side by side.
- Name the operating-system file functions one by one and demonstrate locating a file in a folder tree.
- Model creating a subject, term and week folder hierarchy on the drive.
- Demonstrate renaming a file and navigating the directory tree to the renamed folder.
- Set the folder task and close with the exit question about naming conventions.
Student activities
- Identify the problem with the misfiled drives and suggest a correct filing scheme.
- Name the operating-system file functions and give one example each.
- Create a subject, term and week folder hierarchy and place a sample file in the week folder.
- Rename the sample file to a clear filename with proper casing.
- Navigate the directory tree to find the renamed file and open it.
- Answer the exit question in one sentence about naming conventions.
Practical / learning evidence
A completed folder hierarchy with three levels and a sample file saved in the correct week folder, plus a renamed-file confirmation record. Inspect the folder structure and confirm the file opens.
Resources and preparation
Computers with file manager access, blank drive roots and a sample file to create, rename and locate. Disable Caps Lock before drills. Confirm that every learner can write to the drive and that the drive has space.
Assessment for learning
Inspect the folder hierarchy for three correct levels and the sample file placed precisely. Check the filename for proper casing and clarity. Ask two learners to navigate the tree and locate the renamed file. Record any learner who confuses renaming with deletion.
Inclusion and homework
Provide a prebuilt folder hierarchy template so learners can focus on renaming and location. Allow extra time on the search and provide a shorter file list for learners who need quick wins. Extend confident learners with subfolders under week folders for individual learners. Homework: rename five files in one folder to reflect their content, subject and term.