Top education and reference sites: Wikipedia, Yahoo! Education, eHow by ZDNet's ZDNet Research -- Nielsen//NetRatings notes that between September 2004 and September 2005 the traffic to education and reference Web sites grew 22% on average. However, two sites, which also happen to lead the ratings of education sites, Wikipedia and Yahoo! Education, experienced triple-digit increases in traffic over the past 12 months.Education and reference site trafficSiteUnique audience, 000Growth Sep 2004Sep [...]