if you want to learn how to read fast start with a book or something that you already know that you've read before and start reading it over and over, then each time you read it try to read it a little bit faster in practice that way.
C) I would say. You can learn many things from rollercoasters, like how much mass they can hold. The distance they go in a daily trip. Rollercoasters can be of use for science for a fun learning experience!
