This update was originally published on 7 September 2022. We have now published a new model assignment for Unit 21: Product testing techniques. You can view and download the assignment from the Assessment > Model assignments section of the Cambridge Technical in Applied Science qualification page.
We've received new guidance on the safe use of dichloromethane (DCM or methylene chloride) in schools. In light of this, we are recommending teachers do not continue using this solvent or the suggested method with their students. Consequently, we've removed the Unit 21 Product testing techniques model assignment (L/508/1426) from our website.
We will be providing an alternative model assignment for Unit 21 which will provide guidance on how students can evidence the learning objectives, suggested teaching resources, and exemplar practical methods to use safely in schools – we'll let you know when this is available.
If you would like suggestions for alternative practical methods or if you have any queries about this update, please email us at firstname.lastname@example.org.