English National Curriculum - Science
Mission Objectives
Describe the process of chromatography
Calculate the Rf value
Evaluate the process of chromatography and suggest improvements
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Words and meanings to learn
stationary phase
phase in chromatography that does not move, for instance, the paper in chromatography
Rf value
the ratio between the distance travelled by the dissolved substance (the solute) and the distance travelled by the solvent
mobile phase
phase in chromatography that moves, usually a solvent or mixture of solvents
insoluble
a substance that does not dissolve in a solvent
soluble
a substance that can be dissolved in a solvent to form a solution
Samantha is an accomplished science educator whose current work centres on curriculum design and professional development, supporting teachers to deliver high-quality science education through evidence-informed approaches. She is a former Head of Chemistry and Sixth Form Tutor with extensive Key Stage 4 and 5 experience, and has worked as an AQA examiner, giving her valuable insight into assessment standards and what students need to succeed.
Samantha has written the complete KS4 Science curriculum, fully aligned with the AQA GCSE Science: Trilogy specification. Covering biology, chemistry and physics, the curriculum is carefully sequenced so that students build knowledge cumulatively and see clear connections between concepts across the three sciences. Drawing on her experience as an examiner and on research into effective teaching, she has designed it to embed retrieval practice, clear explanation, worked examples and the required practicals throughout, preparing students for the demands of the GCSE exams. Grounded in the realities of the classroom, the curriculum is rigorous for students and manageable for busy teachers.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket.
Class practical on paper chromatography using coloured pens: coloured felt tips, chromatography paper, pencils, rulers, wooden splints, paperclips.
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