3A.1 Observing Cells

Pearson Edexcel International A Level Biology Core Practical 2 Teaching Resource (WBI12)

• Designed for: Pearson Edexcel International A Level Biology
• Covers: Unit 2: Cells, Development, Biodiversity and Conservation (WBI12)
• Aligned with specification point: 3A.1 – Observing Cells (Core Practical 2)

This teaching resource includes clear lesson slides, step-by-step practical method guides, and student-friendly summaries for light microscopy, specimen staining (methylene blue and iodine), eyepiece graticule calibration, and magnification calculations (I=A×M).

Designed to support both teachers and students, this resource helps learners understand microscope setup and focusing protocols, slide preparation techniques, unit conversions (mm, μm, nm), graticule calibration using stage micrometers, and official Edexcel biological drawing rules. Ideal for classroom teaching, revision, independent study, and practical exam preparation.

Includes:

• Easy-to-follow practical methods and staining protocols
• Step-by-step worked calculations for graticule calibration & I=A×M
• Clear biological drawing guidelines and exam mark scheme rules
• Key notes, revision summaries, and exam-focused tips
• Fully aligned Pearson Edexcel International A Level material

Perfect for: A Level Biology lessons, practical revision sessions, tutoring, homework support, and exam prep.