Check the box for each word you know at least one definition for.
(Don't check boxes for words you know you've seen before,
but whose meaning you aren't exactly sure of.)
Tip: on Windows computers, you can
navigate and select checkboxes with your keyboard using
tab and
space.
Works for everyone, from small children (with parental help) to college professors!
Learn English online
This site can help you evaluate your progress in
English language learning,
both ESL (learning English as a second language) and EFL
(learning English as a foreign language). Online courses like
Englishtown, for learning English online, can help improve your
vocabulary.