GreatSchools typical ad vehicles are as follows:
Pop-under - 720x300 pixel size. Maximum file size 12K.
Targeted Super Banner - 500x90 pixel size. Maximum file size 12K.
Targeted Banner - 468x60 pixel size. Maximum file size 12K.
Targeted Skyscraper - 120x600 pixel size. Maximum file size 12K.
Targeted Half Banner - 234x60 pixel size. Maximum file size 12K.
Tiles
120x90 pixel size. Maximum file size 5K. Static,
animated or text. GIF/JPEG accepted.
Email Newsletter Contextual Ads
475x125 pixel size (can vary slightly by ad). Up to 250
characters of text including spaces and linking URLs.