Core vocabulary are the most important words of a language. If you master these, you'll be able to read upwards of 70% of all words in a Latin work. In this video, I talk about a tool that I created to measure your understanding of Latin's core words. There's both practice and a competitive quiz feature.
I am indebted to Dr. Chris Francese of Dickinson College for permission to use the core vocab list of a thousand Latin words that he created. For more information on that, visit dcc.dickinson.edu/vocab/core-vocabulary.