the elective part of the nss ict curriculum - edb.gov.hk · pdf file1 the elective part of the...

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The Elective Part of theNSS ICT Curriculum

D. Software Development

Mr. CHEUNG Wah-sang / Mr. WONG Wing-hong, RobertMember of CDC – HKEAA Committee on ICT

(Senior Secondary)

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D. Software DevelopmentThe Elective Part

The concepts / skills learnt in this option is easily transferable and applicable in analysing and solving problems we face in daily lives.

It gives opportunities to students to understand and analyseproblems from macro and micro point of views.

It offers a balance between theoretical knowledge and technical knowledge.

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This elective helpsto develop students’ their problem-solving skills through a systematic approach to algorithm design and programming, as well as to improve their logical thinking and critical thinking skills;to develop students’ creativity and broaden their views on software development;to offer students a wider choice from which to think and select an appropriate approach to solve a specific problem in future.


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If students

are problem-solvers, and are keen on carrying out projects using computers may consider selecting this elective which focuses on solving problems and developing solutions.

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Learning ObjectivesStudents will learn about:

how to define and analyse problems;the importance of good programming skills and good programming styles;the importance of formulating appropriate algorithms in solving problems;creative design and development of computer programs;how to illustrate different programming paradigms with appropriate programming languages; how to choose different languages to meet different needs;the importance of a systematic approach to software development; andhow to apply concepts underlying software development in a systematic way.


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Overall Time Allocation

Core (18 hrs)

Elective (30 hrs)

Compulsory (20 hrs)- Basic Programming Concepts

Elective (75 hrs)- Systems Development- Programming Languages

- Programming (47 hrs)

CE-CIT (2 years)NSS-ICT (3 years)

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(25 hours)

Time allocation: 75 hrs

Programming(47 hours)

SystemsDevelopment

(16 hours)

ProgrammingLanguages(12 hours)

The Elective PartD. Software Development

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a. Programming (47 hrs)

i. Problem definition and analysisii. Design of solutioniii. Implementationiv. Testing and evaluationv. Documentation

b. Programming Languages (12 hrs)

i. Programming paradigmsii. Language translators and compilers


Details

Details

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c. Systems Development (16 hrs)

i. Basic conceptsii. Systems Analysisiii. System designiv. Systems implementationv. System conversion and maintenancevi. Systems documentationvii. Alternative approachesviii. The personnel

D. Software Development

The Elective Part

Details

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Aims and Objectives


High order thinkingHigh order thinking

Creativity


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Choices of Programming Languages


Examination- Pascal / C

Coursework- Not specified

Examination- Pascal / C- Java / VB

Coursework- Not specified


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a. Programming (47 hrs)Contents


Same - Core Module

Problem Definition- define problem- identify tasks


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Same - Elective Module A- Trial-and-error

I/O AnalysisTop-down/bottom-upModularity (compulsory)

Structured prog.


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Same- Core module

- Elective A - Elective A- Elective A- Core Module

Data types & Algorithms- Integer, real, character, Boolean (Compulsory)

- String & linear array- User defined- Truth tables (Compulsory)

- Flowcharts / block diagram


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Same - Elective Module A- Loosely defined

Algorithms:- counting- accumulating- swapping- searching (linear, binary)- sorting (bubble, insertion, merge)

- merging (2 arrays)


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Selection of Algorithms:- complexities- data structure- efficiency- correctness- appropriateness


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Same - Elective Module A

Basic constructs:- global variable- local variable- constants- assignment statements- I/O statements- operators- precedence- association


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Control structures- sequence- selection- iteration


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Same - Elective Module A- concepts only

ADT(implemented by arrays)- list- linked list- stack-queue


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Text File handling- delete records- insert records- append records- amend records


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Subprograms- passed by value- passed by reference


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Programming style- meaningful variables- comments- space & indentation


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Same - Elective Module A (implicit)

Structured programming- Why and advantages


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NoNumerical errors- rounding- truncation- overflow- underflow


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Program Errors- syntax- logical- runtime


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Debug- manual- software- stubs/flags- breakpoints/trace


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Same - Full range of test cases

Test data designCE-CIT (2 years)NSS-ICT (3 years)

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Same - Program documentation(titles, lists, variable definitions,test data, sample output, internal documentation, etc.)

Documentation- Algorithm representation- program listing- test data- user manual


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b. Programming Languages (12 hrs)Aims and Objectives


Aware / UseAppropriate LanguagesMake Choice


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b. Programming Languages (12 hrs)Contents



Programming Paradigms- Procedural, logic, object oriented- query language

Illustration


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b. Programming Languages (12 hrs)Contents



- assembler

Translator & Compiler- compilers & interpreters

- code generation, linker & loader (Define)


Back

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c. Systems Development (16 hrs)Aims and Objectives


Program Development - Elective Module A

Problem Solving - Core

Systems Development- Systematic approach

- Apply concepts


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c. Systems Development (16 hrs)Content


SameBasic concept- basic element- Waterfall Model


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- Loosely definedSystem analysis- Information gathering activities.- feasibility study VS proposed solution- write specifications


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-Loosely defined

- same

System Design

- Functions of parts- User interface (design, comparison ..)- use of chart and support documents- Use Gantt Charts on project management


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- Debug / Test programSystem implementation- Different types of test(unit test, system testing, acceptance testing)

- Design simple test plan


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NoConversion & Maintenance- different strategies(pilot, phased, parallel, direct)

- needs for maintenance …..


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Same- Elective Module A

Systems DocumentationCE-CIT (2 years)NSS-ICT (3 years)

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Same- Elective Module A- other approaches can be used.

(top-down, bottom-up, trial-and error approaches)

Alternative Approaches- Limitation of Waterfall- Latest Approaches

(Prototyping, Rapid Application Development)


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NoPersonnel - in systems development


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a. Programmingii. Design of Solution

Addition: Select appropriate data types for a solution.

b. Systems Developmentii. System Analysis

Addition: Identify the major task involved in solving a problem.iii. Systems Design

Deletion: Know Critical Path Analysis on project management.Addition: Use Gantt Charts for project management.

iv. System ImplementationDeletion: Identify the major tasks involved in implementation.

The Elective Part

D. Software DevelopmentChanges made since 2nd Consultation

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Variations of Curriculum Planning:

• Programming first, then Systems Development

• Systems Development, then Programming


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Experience sharing: Examples of learning and teaching activities

Authentic Tasks:Data collection -- design a questionnaire

conduct an interview Systems design – draw a Gantt Chart

*** Emphasis should be put on the overall system analysis and design, not just on technical programming skills.


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Example 1 - Small Change (data type)Enter the amount($): 2004.8$1000: 2$2 : 2$0.5 : 1$0.2 : 1$0.1 : 1Again (Y/N): YEnter the amount($): _


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Example 2 – The More The Less (overflow error)var i:integer;begin

i:=20000;writeln ('i=',i);readln;i:=i*2;writeln ('i=',i);readln

end.


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Example 3 – Mark Six (data structure and algorithm)Press ENTER to draw a number...The first drawn number is: 33The second drawn number is: 21The third drawn number is: 5The fourth drawn number is: 24The fifth drawn number is: 7The sixth drawn number is: 1

The six numbers drawn are:1 5 7 21 24 33


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Example 4 – Leave A Message System (LAMS)(Systems development)

***Students are required to:- Set a questionnaire- Prepare interview questions- Interview with the hotel manager- Draft the system requirements/specifications- Prepare a work schedule (use of Gantt Chart)

- Produce a prototype for demonstration


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Example – Leave A Message System (LAMS)

***Students are required to: (optional)- develop the system- testing and evaluation - documentation


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Example – Leave A Message System (LAMS)Test Plan


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Example – Leave A Message System (LAMS)

*** Points to note:- Cross-curricular activity- Create a scenario- Encourage :

* team work* originality* documentation (reports / journal)* self-motivation / self-learning


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Other examples of Systems Development project

- Room Allocation Wizard (RAW)

- Homework Input and Storage System (HISS)


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Thank you!

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