Reading an explanation of a metric produces recognition, not knowledge. Finding the same figure in a real company's filing produces knowledge, because the filing does not label things the way a lesson does and you have to decide for yourself what counts. So every concept in the course closes with one specific thing to go and look up, and this page gathers all of them.
Each drill names the document to open, the term to search for, and what a correct answer looks like, so someone working alone can tell whether they did it right. They cover the three statements, share count and enterprise value, every valuation multiple, margins and returns on capital, cash flow quality, leverage, capital structure, working capital, growth, the earnings-quality red flags, and the decision itself.
Ticks and notes are saved as you go, so a finding written against one drill is still there when you come back to compare a second company against the first.
Educational, not investment advice.