This is a ppt for a lesson on Chromatography, it is based on the new AQA Triology specification. The ppt has elements of self assessment and peer assessment. The practical it refers to is the RSC practical on Chromatography and M@M's. The PPT is for a range of abilities and can be made more challenging by questioning the pupils at a higher level. There is also a suggested homework and opportunities to attempt calculating the Rf values, along with a focus on core scientific procedures.