Very chellanging competition making people hooked to the app, and by scoring full marks in all courses isn't as good as... the given full marks are always as good as you've made mistakes as each courses were sure to give you less marks...! Bedides, contridictions and mistakes here and there indide the lessons is a very much common issues faced...! I've stopped learning new lessons due to that, as I really don't want to learn something that is wrong or misleading...! Please kindly do improve it..