- Captain Kidd's crew experiments with sinking and floating, by Mark Weakland ; illustrated by Troy Cummings
- Football opposites, by Mark Weakland
- Weakland, Mark, Football words
- Fast, strong, fearless, football adjectives, by Mark Weakland
- Scooby-Doo! and the ruins of Machu Picchu, the hidden city howler, by Mark Weakland ; Consultant : David Chicoine, PhD Associate Professor Department of Geography and Anthropology Louisiana State University ; [illustrated by Dario Brizuela]
- Do-4U the robot experiences forces and motion, by Mark Weakland ; illustrated by Mike Moran
- Bubbles float, bubbles pop, by Mark Weakland
- Football ABC, by Mark Weakland
- Weakland, Mark, Unearthing ancient civilizations with Scooby-Doo
- Who's who at school, by Mark Weakland ; illustrated by Nina de Polonia-Nill
- Pass, catch, tackle, football verbs, by Mark Weakland
- Weakland, Mark, Unearthing ancient civilizations with Scooby-Doo!
- Seeds go, seeds grow, by Mark Weakland
- Stadium, jersey, player, football nouns, by Mark Weakland
- Hockey patterns, by Mark Weakland
- Hockey shapes, by Mark Weakland
- Scooby-Doo! and the buried city of Pompeii, the ghastly guide, by Mark Weakland ; Consultant : Jessie Weiner, PhD Assistant Professor of Classics Hamilton College ; [illustrated by Christian Cornia]
- Scooby-Doo! and the cliff dwellings of Mesa Verde, the ghostly gaze, by Mark Weakland: Consultant : Julie Markin, PhD Assistant Professor of Anthropolgy Washington College ; [illustrated by Christian Cornia]
- Football colors, by Mark Weakland