How do previous off-reservation boarding schools compare to Sherman Indian High School?

Hello. Your question is incomplete and imprecise, which prevents me from giving you a specific answer. I need a bigger context to answer it efficiently. However, I am going to give you an answer that I believe can help you find the correct answer. I hope it helps you.

The above question asks for a comparison between two boarding schools. A comparison should be made showing similar characteristics that these two boarding schools have, that is, you should look for similar or equal characteristics between two boarding schools to answer your question.

21 balloons is the story of professor william sherman's travels.

in 1883, he set off from san francisco for a balloon ride over the pacific and was found a month later floating with 21 balloons in the atlantic ocean. this seemed an astounding feat and everyone wanted to know what had happened.    

professor sherman was loyal, however, and said he would tell his tale first to the western american explorers club in san francisco, of which he was a member. this built up suspense for several chapters before he began to tell of the wonders of his adventures and the amazing island of krakatoa, an island which had just been blown up by a volcano.  

the residents of krakatoa are all millionaires who live under a "gourmet government" of their own devising. we get to see all the incredible adventures that creative people with unlimited resources would create according to the author.