SS 1 First Term

LEARNING OBJECTIVES: BY THE END OF THE LESSON STUDENTS SHOULD BE ABLE TO:

Cognitive	i. Revise all topics of the term. ii. Consolidate the parts of the computer system. iii. Practise questions on software, the operating system and word processing. iv. Prepare for the end of term examination.
Affective	i. Appreciate the value of Revision in school, at home and in the community. ii. Show willingness to use digital tools carefully, safely and responsibly.
Psychomotor	i. Draw and label the parts of a computer system from memory. ii. Draw the table comparing RAM and ROM from memory. iii. List five functions of an operating system. iv. Write a simple three line program plan using sequence.

Rationale: A computer system has hardware, software and people that work together on data. Understanding review of the Computer System and History, review of Devices, Memory and Software, review of Languages and Programming, answering Examination Questions helps learners use digital technology confidently, safely and responsibly.

Pre-requisite Knowledge: In Week 10, learners studied Computer Languages and Programming, including machine, Assembly, and High-Level Languages, compilers, Interpreters, and Why We Program, a First Taste of Python. 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 Revision, practical task sheets, learners' notebooks and pens.

Reference Materials: Digital Technology for Senior Secondary Schools (SS 1); NERDC Digital Technology Curriculum; Digital Technology SS 1 First Term Notes (Week 11); 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 10 (Computer Languages and Programming) with two quick oral questions, and asks what they already know about Revision. Elicits responses and writes the topic on the board.	Recall the previous lesson and share what they already know about Revision.	Connecting prior knowledge to Revision.
Step 1 6 MINUTES	Covers Review of the Computer System and History: A computer system has hardware, software and people that work together on data. Data enters as input, is processed, and leaves as output, and results may be stored. Data is a raw fact, while information is data arranged to give meaning.	Listen, take notes and answer oral questions on "Review of the Computer System and History".	Understanding: Review of the Computer System and History.
Step 2 6 MINUTES	Covers Review of Devices, Memory and Software: Input devices enter data and output devices present results. Some output is soft copy on a screen and some is hard copy on paper.	Copy the key points, give examples from school and everyday life, and ask questions on "Review of Devices, Memory and Software".	Understanding: Review of Devices, Memory and Software.
Step 3 6 MINUTES	Covers Review of Languages and Programming: A computer language may be low level, such as machine or assembly language, or high level, close to English. A compiler translates a whole program, while an interpreter translates it line by line.	Discuss in pairs, then report one point on "Review of Languages and Programming" to the class.	Understanding: Review of Languages and Programming.
Step 4 6 MINUTES	Covers Answering Examination Questions: Objective questions reward accuracy, so read every option before choosing. Short answer questions reward precision, so give exactly what is asked. In a difference question write both parts.	Respond to questions, complete the examples on the board and note down "Answering Examination Questions".	Understanding: Answering Examination Questions.
Practical Work 6 MINUTES	Guides learners through the practical work: (i) Draw and label the parts of a computer system from memory. (ii) Draw the table comparing RAM and ROM from memory. (iii) List five functions of an operating system. 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. Revise all topics of the term. ii. Consolidate the parts of the computer system. iii. Practise questions on software, the operating system and word processing. iv. Prepare for the end of term examination.	Respond verbally and in writing to the evaluation questions.	Assessment and consolidation of the lesson content.
Conclusion 2 MINUTES	Recaps the main points: review of the Computer System and History, review of Devices, Memory and Software, review of Languages and Programming, answering Examination Questions. Links them to the assignment and previews Week 12: Examination.	Listen, ask questions and copy the assignment.	Reinforcement of key concepts and a preview of the next lesson.

Assignment: i. A designer is asked how a computer can hold a letter, a photograph and a song. Explain how a computer represents information, why the system uses only two symbols, and show how the letter A and the word CAT are stored. ii. (a) Trace the historical development of calculating devices by highlighting the contributions of the Abacus, John Napier, Blaise Pascal, and Charles Babbage. (b) Explain why Charles Babbage is regarded as the 'Father of Computers'. (c) Convert a storage measurement of 16 Megabits (Mb) into Megabytes (MB), recalling that 1 Byte = 8 bits. Show your workings.