Have a look at InstaGrok

Try the video on this Instagrok site to find this fascinating research and organizational tool, an innovative educational search engine that:

• empowers differentiated learning
• provides personalized assessment
• builds 21C research, curation, and synthesis skills
• finds age-appropriate educational content on any topic presented with interactive multimedia interfaces
• generates quiz questions based on student's research activity and skill level
• supports creation of research journals and concept maps for learning assessment

Best of all, it seems it's free so it's worth a try.  Testimonials include Joyce Valenza.