Podcast tech edge review
Briticannica Kids: Knights and Castles
A teacher can use this app to teacher their students about castles and knights by having it as a resource for their students to use when researching things. The app can also a fun thing to use when students have some down time to play games/puzzles.
The Apps website can be found here.
Bottom Line is that I would buy this app if you are going to spend more than a week covering knights and castles in your classroom because it is an amazing app but it costs some money.
I would recommend going to the Smithsonian's website because it is more engaging and resourceful than the app is.
The bottom line is that I wouldn't get this app unless you live closer to Smithsonian museums.