Ben and Ellie's class has a new teacher, and it's a dog named Riff!

No one takes Spencer Zumbro seriously when he tried to warn his classmates about the mysterious things prowling the halls and classrooms of Welcher Elementary School. But when he sees Marv, the janitor, going after one of the creatures with a vacuum, he knows he's not the only one who can see them. With the help of his new friends, Daisy, Spencer has to find out what the janitors know. The children's search uncovers the magic taking place behind the...

Molly helps with the American war effort during the 1940s.

Pedro runs for class president against his friend Katie Woo.

Eight-year-olds Sydney (girl) and Sidney (boy) are neighbors, classmates, and usually friends, so working together on the school play should not be too difficult.

Retired scientist Miss Tracy comes to Ella Mentry School to teach about the planets and the solar system and casts A.J. as Uranus in the school play.

Ryan wants to form a curling team at school with A.J. and Andrea, but soon trouble amongst his teammates threatens to end their season early.

When Ella Mentry School invites a local dentist to speak on National Dessert Day, A.J. and his friends uncover the dentist's secret plot to promote cavities for more business.

Missy wants to take home the class pets, but another girl, Tiffany, has already asked their teacher so Missy and her friend Oscar need to come up with a plan to make Tiffany change her mind.

When Eva Wingdale sees something large and white flying above her she is convinced that it is a ghost, although most of the other owls just laugh at her--until something large and heavy and white lands on the school roof.