As Weinberg points out, most companies will raise money at some point, and it's better to enter financing situations with a grasp of how things work so that you're less prone to make mistakes. And as such Weinberg lays out a fairly comprehensive lesson plan for gaining an understanding of the terminology in term sheets.
Weinberg also points to links to sample documents (such as this Series Seed Term Sheet) so you can see what actual term sheets look like as you read these series. Having a concrete example will help you learn the definitions of key terms ("conversion," "liquidation preference," and so on).
Once you understand the terms of the seed documents, Weinberg says to move on to the venture term sheets:
Weinberg also points to the book Term Sheets & Valuations, but notes that, indeed, most of the necessary information can be found online.
Take a week to study the material, in half-hour increments, says Weinberg. And yes, this will be on the final exam.