Go to every site to gather all you can regarding your own artist background in the Biography sites. Look at the artist's works in the Galleries, and understand the defintion of Impressionism/Post-Impresionism. Keep good notes as they will be used for your Critique of the artist. There are two artists in this site and each one has its own bibliographies, galleries, and definitions.
http://biogs.com/famous/vangogh.html
http://cgfa.sunsite.dk/gogh/gogh_bio.htm
http://www.repropaint.com/Vangogh/vangogh.htm
http://oceansbridge.com/artist-biography/vangogh.php
http://www.impressionniste.net/vangogh_vincent.htm
GALLERIES OF VINCENT VANGOGH http://www.expo-vangogh.com/1_4.cfm
http://artcyclopedia.com/artists/van_gogh_vincent.html
http://www.nga.gov/cgi-bin/psearch?Request=S&Name=van+gogh&Title=&imageset=1
http://www.artchive.com/artchive/V/vangogh.html
http://www.vangoghgallery.com/misc/bio.htm
DEFINITIONS OF IMPRESSIONISM/POST-IMPRESSIONISM http://www.ibiblio.org/wm/paint/glo/impressionism/
http://www.artcyclopedia.com/history/post-impressionism.html
BIOGRAPHIES OF PAUL SIGNAC http://www.abcgallery.com/S/signac/signacbio.html
http://www.libcom.org/history/articles/1863-1935-paul-signac/index.php
http://www.artchive.com/artchive/S/signac.html
GALLERIES OF PAUL SIGNAC http://artcyclopedia.com/artists/signac_paul.html
http://www.abcgallery.com/S/signac/signac.html
http://www.nga.gov/cgi-bin/psearch?Request=S&Name=signac&Title=&imageset=1
DEFINITIONS OF IMPRESSIONISM/POST-IMPRESSIONISM/POINTILLISM http://www.ibiblio.org/wm/paint/glo/impressionism/
http://www.artcyclopedia.com/history/pointillism.html