A bumper lesson on teaching profitability ratios. The lesson clearly explains how to calculate both gross profit margins and net profit margins. The lesson explains why profitability ratios are useful and gives many clear and simple examples to explain them. The PPT leads on to a great worksheet where students need to use their knowledge and calculate and analyse the gross and net profit margins from a number of businesses. I have also included a nice multiple choice quiz for a great lesson starter. Perfect resources for teaching finance for Business Studies.