Possessive adjectives (Spanish 2 & 3): These are used with the noun and must match the noun that they modify.
http://www.studyspanish.com/practice/possadj.htm
Possessive pronouns (Spanish 3 only): These are used in place of the noun and must match the noun they replace.
http://www.studyspanish.com/lessons/posspro.htm NOTES
http://www.elearnspanishlanguage.com/grammar/pronouns/possessivepronouns.html NOTES
http://www.studyspanish.com/practice/posspro.htm
http://www.learnspanishfeelgood.com/pronouns-possessive1.html
http://www.learnspanishfeelgood.com/pronouns-possessive2.html