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- Hockey records, by Mark Weakland
- Scooby-Doo! and the truth behind werewolves, by Mark Weakland ; illustrated by Dario Brizuela
- Weakland, Mark, Football words
- Duck-billed dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- Bubbles float, bubbles pop, by Mark Weakland
- Two-legged, meat-eating dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- Fast, strong, fearless, football adjectives, by Mark Weakland
- Baseball records, by Mark Weakland
- Yogi Bear's guide to animal tracks, by Mark Weakland ; illustrated by Christian Cornia ; consultant, Dr. John D. Krenz, Department of Biology, Minnesota State University, Mankato, Minnesota
- Basketball records, by Mark Weakland
- Weakland, Mark, Yogi Bear's guide to the great outdoors
- Scooby-Doo! and the truth behind vampires, by Mark Weakland ; illustrated by Christian Cornia
- Captain Kidd's crew experiments with sinking and floating, by Mark Weakland ; illustrated by Troy Cummings
- Smash!, Wile E. Coyote experiments with simple machines, by Mark Weakland ; Illustrated by Christian Cornia
- Football ABC, by Mark Weakland
- Magnets push, magnets pull, by Mark Weakland
- Weakland, Mark, Solve it with Scooby-Doo!
- Flying reptiles, ranking their speed, strength, and smarts, Mark Weakland
- Whoosh, crunch, roar, football onomatopoeia, by Mark Weakland
- Long-necked dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- Horned dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- Gears go, wheels roll, by Mark Weakland
- When Wilma Rudolph played basketball, by Mark Weakland ; illustrated by Daniel Duncan
- Scooby-Doo! a subtraction mystery, the case of the disappearing doughnuts, by Mark Weakland ; illustrated by Scott Gross
- Extreme sports records, by Mark Weakland
- Pass, catch, tackle, football verbs, by Mark Weakland
- Scooby-Doo! an addition mystery, the case of the angry adder, by Mark Weakland ; illustrated by Scott Gross
- Onion juice, poop, and other surprising sources of alternative energy, by Mark Weakland
- Scooby-Doo! and the truth behind mummies, by Mark Weakland ; illustrated by Scott Neely
- Scooby-Doo! an even or odd mystery, the case of the oddzilla, by Mark Weakland ; illustrated by Scott Gross
- Zombies and forces and motion, by Mark Weakland ; illustrated by Gervasio
- Armored dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- The adventures of Perseus, a graphic retelling, by Mark Weakland ; illustrated by Estudio Haus
- Seeds go, seeds grow, by Mark Weakland
- Football records, by Mark Weakland
- Weakland, Mark, Flintstones explain simple machines
- The solid truth about matter, by Mark Weakland ; consultant, Alec Bodzin ; illustrated by Bernice Lum
- Soccer records, by Mark Weakland
- Thud!, Wile E. Coyote experiments with forces and motion, by Mark Weakland ; illustrated by Christian Cornia
- Yogi Bear's guide to bugs, by Mark Weakland
- Scooby-Doo! a number comparisons mystery, the case of the lunchroom gobbler, by Mark Weakland ; illustrated by Scott Gross
- Fred Flintstone's adventures with inclined planes, a rampin' good time, by Mark Weakland ; illustrated by Alan Brown
- Stadium, jersey, player, football nouns, by Mark Weakland
- Fast, strong, fearless, football adjectives, by Mark Weakland
- Duck-billed dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- Scooby-Doo! and the truth behind werewolves, by Mark Weakland ; illustrated by Dario Brizuela
- Two-legged, meat-eating dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- Hockey records, by Mark Weakland
- Baseball records, by Mark Weakland
- Yogi Bear's guide to animal tracks, by Mark Weakland ; illustrated by Christian Cornia ; consultant, Dr. John D. Krenz, Department of Biology, Minnesota State University, Mankato, Minnesota
- Basketball records, by Mark Weakland
- Long-necked dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- Whoosh, crunch, roar, football onomatopoeia, by Mark Weakland
- Scooby-Doo! and the truth behind vampires, by Mark Weakland ; illustrated by Christian Cornia
- Flying reptiles, ranking their speed, strength, and smarts, Mark Weakland
- Smash!, Wile E. Coyote experiments with simple machines, by Mark Weakland ; Illustrated by Christian Cornia
- Scooby-Doo! a subtraction mystery, the case of the disappearing doughnuts, by Mark Weakland ; illustrated by Scott Gross
- Horned dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- When Wilma Rudolph played basketball, by Mark Weakland ; illustrated by Daniel Duncan
- Scooby-Doo! an addition mystery, the case of the angry adder, by Mark Weakland ; illustrated by Scott Gross
- Extreme sports records, by Mark Weakland
- Scooby-Doo! and the truth behind mummies, by Mark Weakland ; illustrated by Scott Neely
- Scooby-Doo! an even or odd mystery, the case of the oddzilla, by Mark Weakland ; illustrated by Scott Gross
- Thud!, Wile E. Coyote experiments with forces and motion, by Mark Weakland ; illustrated by Christian Cornia
- Soccer records, by Mark Weakland
- The adventures of Perseus, a graphic retelling, by Mark Weakland ; illustrated by Estudio Haus
- Yogi Bear's guide to bugs, by Mark Weakland
- Armored dinosaurs, ranking their speed, strength, and smarts, Mark Weakland
- Football records, by Mark Weakland
- Fred Flintstone's adventures with inclined planes, a rampin' good time, by Mark Weakland ; illustrated by Alan Brown
- Scooby-Doo! a number comparisons mystery, the case of the lunchroom gobbler, by Mark Weakland ; illustrated by Scott Gross