The Magic School Bus Inside the Earth
Students in Ms Frizzle's class are about to study earth science. For homework, they are asked to bring in rocks but, when they show up with everything from concrete to plastic, Ms Frizzle decides it's time for a field trip. Aboard the magic school bus, the class digs through the earth's crust then travels straight to the centre of the earth and out the other side, through the mouth of a volcano.
About The Author
Joanna Cole (born August 11, 1944), who also writes under the pseudonym B. J. Barnet is a United States author of children’s books who teaches science. She is most famous as the author of The Magic School Bus series of children's books.

Cole was born in Newark, New Jersey, and grew up in nearby East Orange. She loved science as a child, and had a teacher she says was a little like Ms. Frizzle. She attended the University of Massachusetts and Indiana University before graduating from the City College of New York with a B.A. in psychology. After some graduate education courses, she spent a year as a librarian in a Brooklyn elementary school. Cole subsequently became a letters correspondent at Newsweek, and then a senior editor for Doubleday Books for Young Readers.