What does the highlighting mean?

Here's a simple breakdown as to what the highlighting in this set of flashcards mean.

Green - HTS (Historical Thinking Skills) Words, these words are used for your SAQs, DBQs, and LEQs. Without the use of the HTS words you will hinder yourself from the benefit of fully explaining what a response is.

Blue - Vocabulary, simple vocabulary that can be used in the mentioned questions above. Its best you learn a decent amount of vocabulary and how it connects to events later on in U.S history.