This first of four lessons on "ser" and "estar" explains the fundamental differences between the two verbs. Perfect for beginning students, the lesson is easy to understand with plenty of examples. A short quiz, oral exercise and test at the end of the lesson evaluates the student's mastery of this grammar principle. Have students click on the printer-friendly page to copy and save notes in their Spanish folder. Teacher can set up accounts and monitor progress on quizzes and tests.