A secondary education revision video to help you succeed in your Science GCSE and IGCSE. Let Mr Thornton simplify how Microscope Magnification Calculations work - it's easy when you know how! No unnecessary information, just the stuff you need to know for GCSE and IGCSE Science revision, in a short, sweet video, to help you Succeed In Your GCSE and IGCSE! Check the free preview and download the prefixes sheet: Get my lesson plans and schemes of work at My Patreon is at if you'd like to support this channel. Try the Snapquiz: Get the app at: Download a revision guide for Kindle at Check out my 2nd channel at Check out my gaming channel at Check my twitter at for regular updates. My Instagram is at Please note that this video relates specifically to GCSE and IGCSE specifications, though it is likely to be useful for other courses too. DISCLAIMER: These videos are a revision guide designed to help students understand the requirements of the GCSE Science course, specifically the course specification(s) mentioned above. Although I say I can "help" students succeed, this should in no way be interpreted as a binding promise that they will definitely achieve any particular final grade. I offer expert guidance to try to improve a student's chances, but as there are so many factors beyond my control, I am unable to make any guarantee about the content of any exams or controlled assessments beyond any restatements of the relevant section or sections of the course specification(s). In my experience, a student's final grade is mainly dependent upon the quantity and quality of preparation he or she puts in. All I can do is try to optimise this preparation. In short, no-one can guarantee a grade; I'm just here to help.