GCSE Science: Required Practicals and Exam Technique

Define the independent variable (what you change), dependent variable (what you measure), and control variables (what you keep the same). Give a reason for each control to show understanding.

Explain accuracy vs precision; use repeats and mean values to reduce random error; identify systematic error sources and how to mitigate (calibration, zeroing scales).

Select correct axes with units; choose appropriate scales; plot neat points with small crosses; draw lines of best fit. Interpret gradient/intercept; identify anomalies and suggest improvements.

Recognise ‘describe’, ‘explain’, ‘evaluate’, ‘compare’, ‘calculate’. Practise matching command words to the depth of response required with short worked responses.

• Flipcards for variables and command words.
• Checklists for each required practical.
• Mini‑quizzes on graphing and data interpretation.
• Short curated videos to refresh techniques quickly.

• Trusted explainer