Instagrok - tudents can use instaGrok to search for a topic and quickly get lists of facts on that topic, links to information on that topic, videos, images, and quizzes on the topic. (From Free Technology for Teachers)
INSTAGROK is a concept based, visual search engine geared for student research. Provides basic facts, video, images on a topic from a variety of web sources. Can also take notes and use for writing papers. Free to use, cost for classroom use.