LET Secondary Social Sciences — Information and Communication Technology and Digital LiteracyRevision Notes

Exam tips

• Memorize the IPO model and be ready to classify any device as input, process (CPU), output, or storage.
• The LET loves the data vs. information distinction — always ask: has it been processed into something meaningful?
• For RAM vs. ROM: RAM = temporary (volatile), ROM = permanent (non-volatile). Memory ≠ storage.
• When classifying software, ask: does it run the machine (system) or help the user do a task (application)?
• Know at least two examples of each hardware category — the LET may give a device and ask you to classify it.

Key points

• ICT (Information and Communication Technology) refers to the full range of tools and systems used to create, store, process, and exchange information — computers, software, networks, mobile devices, and the internet.
• A computer accepts INPUT, processes it through the CPU, and produces OUTPUT — this is the core Input-Process-Output (IPO) model, often extended with STORAGE.
• The CPU (Central Processing Unit) is the 'brain' of the computer; it contains the Control Unit (directs operations) and the Arithmetic-Logic Unit or ALU (performs calculations and comparisons).
• HARDWARE is every physical, tangible part of a computer. SOFTWARE is the set of instructions (programs) that direct the hardware.
• DATA are raw, unprocessed facts and figures (e.g., a list of raw test scores). INFORMATION is data that has been processed into a meaningful, useful form (e.g., the computed class average on a grade sheet).
• RAM (Random Access Memory) is temporary, volatile working memory — it is erased when the computer is turned off. ROM (Read-Only Memory) holds permanent start-up instructions and survives shutdown (non-volatile).
• Do NOT confuse MEMORY (RAM/ROM) with STORAGE (hard drives, USB drives, cloud). Memory is the workspace; storage is the filing cabinet.
• System software manages the machine itself — the most important is the Operating System (OS) such as Windows, macOS, Linux, Android, and iOS. Utilities (antivirus, file compressors) are also system software.
• Application software performs specific user tasks — word processors, spreadsheets, browsers, and educational apps are all application software.
• Key input devices: keyboard, mouse, scanner, microphone, touchscreen. Key output devices: monitor, printer, speakers, projector. Key storage: HDD, SSD, USB flash drive, cloud, memory card.

Definitions

Common mistakes

• Confusing RAM (temporary memory) with storage devices (hard drives, USB drives) — they are different components with different functions.
• Saying the internet and the World Wide Web are the same thing — the internet is the network infrastructure; the WWW is the content (web pages) accessed over it.
• Classifying a browser (Chrome, Edge) as system software — browsers are application software.
• Mixing up input and output devices — a printer is OUTPUT (it produces a result for the user), not input.
• Treating data and information as synonyms — data is raw, information is processed.

Exam tips

• LET scenario questions often describe a task and ask which tool to use — memorize: documents = word processor, numbers/calculations = spreadsheet, slides/presentation = presentation software.
• For the CRAAP test, know all five criteria and what each one checks — Currency asks 'how recent?', Authority asks 'who wrote it and are they qualified?'
• The internet vs. WWW distinction is a classic LET item — internalize: internet = global network, WWW = web pages on that network.
• Fake news identification is a real-world application of the CRAAP test — cross-verify, check the author, and look for sensational headlines.
• Know email etiquette: BCC hides recipients, CC shows them — use BCC when sending to a large group to protect privacy.

Key points

• The three classic productivity applications: Word Processing (documents), Spreadsheets (calculations and data), and Presentation software (slides).
• Word processors (Microsoft Word, Google Docs) — for creating and formatting text documents such as lesson plans, letters, and reports. Features: fonts, styles, spell-check, margins, tables, and inserted images.
• Spreadsheets (Microsoft Excel, Google Sheets) — for organizing numerical data in cells (rows and columns), computing with formulas, and using built-in functions such as SUM and AVERAGE. Use this — NOT a word processor — for grade sheets, budgets, and charts.
• Presentation software (Microsoft PowerPoint, Google Slides) — for building slide decks with text, images, transitions, and animations for teaching or reporting.
• The INTERNET is the global network of interconnected computers. The WORLD WIDE WEB (WWW) is the collection of linked web pages and resources accessed OVER the internet — they are related but NOT the same.
• A BROWSER (Chrome, Edge, Firefox, Safari) is the application used to navigate the web. A SEARCH ENGINE (Google, Bing) is a tool within the web for locating content.
• A URL (Uniform Resource Locator) is the unique web address that identifies a specific page or resource.
• Effective searching: use quotation marks for exact phrases, use minus sign to exclude a word, limit to specific domains (.gov, .edu) for authoritative results.
• Evaluate online sources using the CRAAP Test: Currency, Relevance, Authority, Accuracy, Purpose.
• Email: know the difference between TO (main recipient), CC (carbon copy, visible to all), and BCC (blind carbon copy, hidden from others).
• Cloud storage (Google Drive, OneDrive) keeps files online for access from any device and easy sharing — important for group collaboration and DepEd-connected tasks.
• Video conferencing tools (Zoom, Google Meet) support real-time online classes and meetings — became critical during pandemic-era remote learning in the Philippines.

Definitions

Common mistakes

• Using a word processor when a spreadsheet is needed — if the task involves calculation, data analysis, or charts, choose the spreadsheet.
• Saying the internet and the WWW are the same — this is the most common conceptual error on this topic.
• Confusing a browser (the app that opens web pages) with a search engine (the tool that finds pages) — Chrome is a browser; Google is a search engine.
• Accepting the first search result as reliable without applying any evaluation framework like the CRAAP test.
• Using CC when BCC should be used — CC reveals all recipients' email addresses to each other, which may be a privacy concern.

Exam tips

• For the two cyber laws, use this memory trick: RA 10175 — Cybercrime (online CRIMES are punished); RA 10173 — Data Privacy (personal DATA is protected).
• LET scenario questions about online threats will describe a situation — identify the threat name correctly: fake email asking for password = phishing, software that destroys files = malware, online mocking of a classmate = cyberbullying.
• The NPC (National Privacy Commission) is the enforcement body of RA 10173 — know this for identification questions.
• Connect digital citizenship to your role as a teacher: modeling netiquette, protecting student data (RA 10173), and safeguarding pupils from online harm aligns with the Code of Ethics for Professional Teachers.
• Smishing (SMS phishing) is very common in the Philippines (fake GCash, bank texts) — the LET may use this local context.

Key points

• Digital citizenship is the responsible, ethical, and safe use of technology. It is both a personal competency and a value teachers must model and teach.
• Netiquette (network etiquette) = the courtesy norms expected in online communication. The guiding rule: 'Remember the human' behind the screen.
• Netiquette rules: be respectful, use clear and appropriate language, avoid ALL CAPS (it reads as shouting), respect others' time and privacy, and think before posting.
• Every online action creates a DIGITAL FOOTPRINT — a lasting, often permanent trail of your online activity. Future employers and schools can see it.
• PHISHING: fake emails or messages designed to trick you into revealing passwords or financial details. Defense: never click unknown links; verify the sender.
• MALWARE: malicious software (viruses, worms, trojans, ransomware, spyware) that damages or steals data. Defense: install antivirus software; avoid pirated files and unknown downloads.
• CYBERBULLYING: using digital tools to harass, threaten, or humiliate someone. Defense: do not engage; block, report, and keep evidence.
• IDENTITY THEFT: stealing personal data to impersonate someone online. Defense: guard personal information; review privacy settings.
• SCAMS: fraudulent schemes including fake prizes and text/SMS smishing scams common in the Philippines. Defense: never send money or one-time PINs (OTPs); verify independently.
• PASSWORD HYGIENE: use long, unique passwords; avoid obvious choices like birthdays; do not reuse passwords across accounts; enable two-factor authentication (2FA).
• RA 10175 — Cybercrime Prevention Act of 2012: penalizes online offenses such as illegal access (hacking), computer-related fraud and forgery, identity theft, and online libel.
• RA 10173 — Data Privacy Act of 2012: protects personal information collected by government and private organizations; created the National Privacy Commission (NPC) to enforce it. This law covers students' school records that teachers handle.

Definitions

Common mistakes

• Mixing up RA 10175 and RA 10173 — remember: 10175 = Cybercrime (five is for crime), 10173 = Data Privacy.
• Thinking cyberbullying is only a social issue and not a legal one — RA 10175 covers cyberbullying-related harassment, and schools have anti-bullying policies under RA 10627.
• Believing that deleting a post removes it from the digital footprint — once posted, content may have been seen, shared, or cached.
• Confusing phishing (deceptive messages) with malware (malicious software) — they are different threats, though phishing can deliver malware.
• Forgetting that the Data Privacy Act applies to teachers — student records, grades, and personal data handled by teachers are covered by RA 10173.

Exam tips

• LET scenario questions will test whether you prioritize LEARNING OBJECTIVES over the technology itself — choose answers where the technology clearly supports a specific learning goal.
• For the digital divide, the correct teacher response is always to plan INCLUSIVELY — provide offline alternatives, not to exclude or penalize students without access.
• The 4 Cs are a common framework in LET Professional Education items too — knowing them in the ICT context strengthens your answer accuracy across subject areas.
• Connect RA 7836 (the Philippine Teachers Professionalization Act) and the Code of Ethics to ICT: professional conduct online is still professional conduct.
• For LMS/blended learning questions, Google Classroom is the most common Philippine school example — know its functions: posting lessons, submitting assignments, giving feedback, communicating with parents.

Key points

• Technology in teaching should always serve a clear LEARNING OBJECTIVE — it is a means to better learning, not an end in itself. This is purposeful integration.
• ACADEMIC INTEGRITY: model and teach honest use of information. Respect copyright and intellectual property, cite sources properly, and guide learners to avoid plagiarism.
• PLAGIARISM is presenting another person's work, ideas, or words as your own without proper attribution — it is both an ethical violation and an academic offense.
• COPYRIGHT gives the creator of an original work exclusive rights to its use and distribution. INTELLECTUAL PROPERTY is the broader category covering creative and inventive works.
• A LEARNING MANAGEMENT SYSTEM (LMS) such as Google Classroom organizes lessons, assignments, communication, and grades in one digital platform.
• BLENDED LEARNING combines face-to-face instruction with online or digital activities — became the dominant model in Philippine schools during and after the COVID-19 pandemic.
• The DIGITAL DIVIDE refers to the gap between those who have access to technology and reliable internet and those who do not — this is a real and pressing issue in Philippine schools, especially in rural and low-income communities.
• A responsible teacher plans for learners with limited connectivity by providing offline or low-data alternatives (printed modules, offline apps) — no pupil should be disadvantaged by unequal access.
• The 4 Cs of 21st-century learning — Critical Thinking, Communication, Collaboration, and Creativity — can be developed through well-chosen technology use.
• DIGITAL WELLNESS includes promoting healthy screen time habits and creating a respectful, safe online classroom environment free of cyberbullying.
• Under the Data Privacy Act (RA 10173), teachers must protect student data — grades, personal information, and records must be handled with confidentiality.
• The Code of Ethics for Professional Teachers (under RA 7836) obligates teachers to uphold professional standards in all contexts, including digital ones — responsible ICT use is part of professional conduct.

Definitions

Common mistakes

• Thinking that using any technology automatically makes a lesson better — the LET tests whether you understand that technology must serve a learning objective.
• Overlooking the digital divide — assuming all students have devices and internet at home is a planning error with equity implications.
• Treating plagiarism as only a problem for university students — elementary teachers must build honest research habits from early grades.
• Forgetting that RA 10173 (Data Privacy Act) applies to classroom data — posting student scores publicly or sharing identifiable student information without consent may violate the law.
• Conflating blended learning with pure online learning — blended learning ALWAYS has a face-to-face component combined with digital activities.