lesson
Evaluate benefits and costs for affected people
1 · Learn
A technology decision can affect convenience, access, privacy, energy use and maintenance. Different groups may experience different benefits and burdens. State whose perspective and evidence a judgement uses.
Avoid presenting a single metric as a complete ethical decision. A faster process may still exclude users who lack a suitable device or accessible alternative.
2 · Worked example
An online-only form can reduce processing time while making participation harder for someone without reliable internet. Both effects deserve consideration.
3 · Your turn
Why is reduced processing time alone insufficient to judge an online-only service?
Check your answer
It does not account for accessibility, exclusion, privacy or other effects on users.
4 · Apply your learning
Compare two fictional service designs and propose a mitigation for one identified disadvantage.
Adult guidance and safety
Use an approved sandbox, invented data and test accounts. Do not probe other systems or expose credentials. Retain test evidence and accessibility checks; these teaching models are not a completed practical project or a specified GCSE qualification.
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Check a calculation · Year 5 onward
Use this only when your teacher or adult allows a calculator for the task. Show your thinking first. It does not replace mental or written arithmetic and does not mark your lesson answer.
Powers, roots and trigonometry · Year 7 onward
Use only when the task allows a calculator. Choose one operation at a time and record your working. Trigonometry here always uses degrees (DEG), not radians. Inverse sine, cosine and tangent return an angle, not a reciprocal. Keep exact fractions and π in answers when requested.
Approximate numerical results use up to 12 significant digits. Inverse sine returns −90° to 90°, inverse cosine 0° to 180°, and inverse tangent −90° to 90°; these are principal values, not every possible solution of a trigonometric equation.
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