Direct object pronouns:
http://www.studyspanish.com/lessons/dopro1.htm NOTES
http://www.studyspanish.com/practice/dopro1.htm
http://www.spanishdict.com/topics/practice/15
https://personal.colby.edu/~bknelson/SLC/DO1.php
https://personal.colby.edu/~bknelson/SLC/DO2.php
http://www.quia.com/pop/315350.html
https://www.conjuguemos.com/activity.php?id=44&source=public&language=spanish&type=fillin
http://www.quia.com/quiz/458685.html
http://www.bowdoin.edu/~eyepes/newgr/prcd.htm
http://www.quia.com/rr/62652.html
Indirect object pronouns:
http://www.quia.com/cz/303177.html
http://personal.colby.edu/~bknelson/SLC/IO.php
http://www.studyspanish.com/practice/iopro1.htm
http://www.spanishdict.com/topics/practice/17
http://www.spanishdict.com/topics/practice/18
http://www.quia.com/quiz/154722.html
http://www.bowdoin.edu/~eyepes/newgr/prci.htm
http://www.123teachme.com/spanish_sentence_quiz/category/indirect_object_pronouns_1
http://www.elearnspanishlanguage.com/tests/te-indirectobject.html
Direct or indirect?
http://personal.colby.edu/~bknelson/SLC/DO_or_IO.php
http://mld.ursinus.edu/~jarana/Ejercicios/self-check/object_pron2.html
Double object pronouns:
http://www.studyspanish.com/lessons/iodopro.htm NOTES
http://www.quia.com/pop/10718.html
http://www.quia.com/jg/89820.html
http://personal.colby.edu/~bknelson/SLC/DO_IO_3.php
http://personal.colby.edu/~bknelson/SLC/DO_IO_2.php
http://personal.colby.edu/~bknelson/SLC/DO_IO_1.php
http://conjuguemos.com/activity.php?id=48&source=public&language=spanish