Some great links to use:
www.dictionary.com if they need help with a word
https://www.pearsonsuccessnet.com/snpapp/login/login.jsp (the online textbook)
www.prezi.com (can use this or PowerPoint)
www.discoveryeducation.com/free-puzzlemaker/

The rest of the links are GREAT research links:

www.bbc.co.uk/history/ancient (great for Egypt, Greece, Rome, Vikings, India)
http://www.bbc.co.uk/schools/primaryhistory/ (great for Mummies, Pyramids, Iron Age, Greece, Rome, Gladiators, Vikings)
www.mrdonn.org (great for everything we cover this year)
www.mitchellteachers.org/WorldHistory/ (India, Islam, Americas, Africa, Rome and Greece)
www.roman-empire.net
www.ancientgreece.com
http://www.pbs.org/teachers/classroom/6-8/social-studies/resources/

www.discoveryeducation.com

I HIGHLY recommend the following to do all of your research because they have approved sites that are reputable for your research

http://www.avl.lib.al.us/resources/display_resources.php

from here, the History Reference Center which is the 3rd one down on the right side is the best one for my class

The Opposing View Points and Student Research Center are also good links

www.sweetsearch.com

http://www.besthistorysites.net/

http://www.cybraryman.com/