An expert-led exam preparation guide for the Pearson Edexcel IGCSE ICT (4IT1) qualification, focusing on common practical pitfalls, structured written question techniques, and calculator conversion math for the storage units.
読了時間 4 分更新日: 2026年6月21日
試験の概要
試験数
2
満点
200
制限時間
4時間 30分
出題形式
5
試験
時間
配点
問題数
配点比率
出題形式
Paper 1: Theory
1時間 30分
100
5
50%
Multiple Choice, Short Answer / Theory, Extended Written Discussion, Matching & Drawing
Paper 2: Practical
3時間
100
7
50%
Practical Execution
評価段階
987654321
電卓の規定
A scientific or graphical calculator is permitted. Graphical calculators must be in exam mode with all stored programs and data cleared before the exam; the calculator must not be able to retrieve stored text or formulae.
AO1: Recall, select and communicate knowledge and understanding of ICT (35%)
AO2: Apply knowledge, understanding and skills to produce ICT-based solutions (45%)
AO3: Analyse, evaluate, make reasoned judgements and present conclusions (20%)
過去問と採点基準にもとづいて作成（2023–2025）。
電卓プログラム
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
目的: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使う場面: Solving or sketching a function when you want to find where its graph crosses or turns.
手順
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
試験での注意: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
目的: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使う場面: Any data-handling, statistics, or required-practical analysis question.
手順
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
試験での注意: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
目的: Keep full-precision intermediate values to avoid rounding errors.
使う場面: Multi-step calculations where premature rounding loses the final accuracy mark.
手順
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
試験での注意: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
目的: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使う場面: As a check only, after solving by hand.
手順
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
試験での注意: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
よくあるミス
1high影響する配点: 2Connectivity
Confusing network content filters with firewalls, leading to irrelevant security-focused answers.
回避方法: Define firewalls as security barriers preventing unauthorized access, whereas network filters restrict specific web content, keywords, or website categories.
2high影響する配点: 4Practical Databases
Leaving data fields or column headers truncated (cut off) in database reports and spreadsheets.
回避方法: Adjust column widths in design view or layout view before taking screenshots or printing to ensure all text is fully visible.
3high影響する配点: 3Practical Spreadsheets
Failing to use absolute referencing ($) in spreadsheet lookup and calculation formulas during replication.
回避方法: Use the $ symbol to lock cell coordinates (e.g., $B$19) before dragging/copying formulas down columns.
4medium影響する配点: 2Digital Devices
Stating brand names of utility software (e.g., McAfee, Norton) instead of generic technical classifications.
回避方法: Always use generic software terms like 'anti-virus', 'anti-spyware', or 'defragmentation utility' in written explanations.
5medium影響する配点: 3Digital Devices
Using a decimal conversion factor of 1000 instead of the binary 1024 in computer storage conversions.
回避方法: Always use exactly 1024 when converting between KiB, MiB, GiB, and TiB (e.g., 1024^3 for GiB to bits conversion expressions).
6high影響する配点: 10The Impact of ICT
Failing to expand 2-mark 'Explain' questions, giving only a single point without a linked expansion.
回避方法: Write answers in two linked parts: state your point first, then describe its consequence or detailed technical mechanism.
7medium影響する配点: 2Practical Web Authoring
Omitting the mandatory 'mailto:' prefix syntax when creating required email links on web authoring pages.
回避方法: Write HTML links using the correct syntax: Send email.
8high影響する配点: 4The Impact of ICT
Failing to structure a balanced argument and a contextual conclusion in the 8-mark Discuss essays.
回避方法: Organize your essay with two paragraphs showing opposing viewpoints, followed by a final paragraph containing a reasoned concluding judgment.