Dan Gutman 
My Weirder-est School #7: Ms. Jo-Jo Is a Yo-Yo! 

With more than 30 million books sold, the My Weird School series really gets kids reading! In this seventh book in the My Weirder-est School series, A.J. and his friendslearn some very weirdways to prepare for a difficult test.Test scores are low and stress levels are high at Ella Mentry School. Wellness expert Ms. Jo-Jo has come to help A.J. and his friends relax so they can ace the upcoming Fundamental Arithmetic/Reading Test.But can turtle yoga and crystal salt lamps really help A.J. and his friends relax and focus? Or will the F.A.R.T. end up blowing them all away?Perfect for reluctant readers and all kids hungry for funny school stories, Dan Gutmans hugely popular My Weird School chapter book series has something for everyone. Dont miss the hilarious adventures of A.J. and the gang!