One way to learn Hebrew vocabulary is by using flashcards.
Biblical Hebrew Course A at Quizlet and Ankiweb*. (These flashcards present basic bH vocabulary and will also be helpful to students who study within another framework.)
Biblical Hebrew Course B at Quizlet.
Biblical Hebrew Course C (weak verbs) at Quizlet.
Biblical Hebrew Course D at Quizlet.
Biblical Hebrew Course E at Quizlet.
*With special thanks to Georges M. for mentioning the link to me.