Dr. Nicholas is ridiculous! - 8 (First edition.)

A.J. and his friends are now third graders at Ella Mentry school in Dan Gutman’s outrageously funny chapter book series My Weirder School.
 
In this eighth book,Dr. Nicholas Is Ridiculous!, college professor Dr. Nicholas visits A.J.’s class to help the students improve their standardized test scores in history. The weird thing is, Dr. Nicholas doesn’t care about the date Christopher Columbus came to America, who wrote the Declaration of Independence, or other important historical facts. She’s more interested in weird information like the history of the toilet bowl!
 
Dr. Nicholas has even built a time machine to take the class on a field trip to the past and future. Who will get stuck in time? You’ll have to read to find out!
 
Goofy illustrations by Jim Paillot make this adventure with Dr. Nicholas even more hilarious.