Enchanted Learning has an Explorer section
http://www.enchantedlearning.com/Home.html

http://k3hss.pwnet.org/3grade/3_3a.htm

http://www.eduplace.com/monthlytheme/october/explorers_activities.html


http://www.connectonline.com/education/kids/k-3/peopleandplaces/index.jhtml

http://www.kidsclick.com/descrip/js_explorers.htm (a software program)

http://www.proteacher.com/090065.shtml

http://www.edhelper.com/newprintables.htm (scroll way down for the Explorer
section)
http://www.cdli.ca/CITE/explorer.htm

http://www.littleexplorers.com/school/Canada/Canadamap.shtml

http://crhslibrary.net/Resources.htm#Explorers

http://www.canadainfolink.ca/history.htm

http://www.civilization.ca/vmnf/explor/explcd_e.html