This website is from NASA and it gives real 3D photos of Mars. It also has instructions on how to make 3D glasses to get the most out of the photos on this website.
This website provides real pictures taken from the Hubble Space Telescope. This website also includes up to date news about the universe and what is happening in it.
Has online help with real tutors if your struggling in subjects like math, science, social studies, and English. There are also people willing to help proof and edit your papers. This website is really helpful if your struggling and need a new view on the topic.
This site allows you to create trading cards for any purpose. you could create cards filled with historical facts about a person (fictional or real). You could fill the card with information about a landmark or location. you could even use this site to create cards for a game. To sum it up, this website could be used to study or play a nice card game that you just created.