|
Hal Clement Award (young adult) | |
| 2015 | Expiration Day, William Campbell Powell |
| 2014 | The Planet Thieves, Dan Krokos |
| 2013 | Cinder: Book One of the Lunar Chronicles, Marissa Meyer |
| 2012 | (tie) A Beautiful Friendship, David Weber |
| 2012 | (tie) A Long, Long Sleep, Anna Sheehan |
| 2011 | WWW: Watch, Robert J. Sawyer |
| 2010 | Catching Fire, Suzanne Collins |
| 2009 | (tie) The Hunger Games, Suzanne Collins |
| 2009 | (tie) Little Brother, Cory Doctorow |
| 2008 | Sky Horizon: Colony High, Book One, David Brin, illustrated by Scott Hampton |
| 2007 | Rash, Peter Hautman |
| 2006 | Uglies, Scott Westerfeld |
| 2005 | Balance of Trade, Sharon Lee & Steve Miller |
| 2004 | Gunpowder Empire, Harry Turtledove |
| 2003 | Feed, M. T. Anderson |
| 2002 | This Side of Paradise, Steven Layne |
| 2001 | Jumping Off the Planet, David Gerrold |
| 2000 | David Brin's Out of Time 3: The Game of Worlds, Roger MacBride Allen |
| 1999 | Alien Dreams, Larry Segriff |
| 1998 | The Dark Side of Nowhere, Neal Shusterman |
| 1997 | Wildside, Steven Gould |
| 1996 | (tie) The Night Room, E. M. Goldman |
| 1996 | (tie) The Winds of Mars, H. M. Hoover |
| 1995 | The Ear, the Eye, and the Arm, Nancy Farmer |
| 1994 | The Giver, Lois Lowry |
| 1993 | River Rats, Caroline Stevermer |
| 1992 | Invitation to the Game, Monica Hughes |
|
Middle Grades | |
| 2015 | Ambassador, William Alexander |
| 2014 | Hello, Nebulon!, Ryan O'Ryan |
| 2013 | Alien on a Rampage, Clete Barrett Smith |
| 2012 | Worst-Case Scenario Ultimate Adventure #2: Mars!, Hena Kahn & David Borgenicht |
| 2011 | Alien Encounter, Pamela Service & Mike Gorman |
| 2010 | Z. Rex, Steve Cole |
| 2009 | Lighter than Air, Henry Melton |
| 2008 | (tie) Shanghaied to the Moon, Michael J. Daley |
| 2008 | (tie) Gravity Buster: Journal #2 of a Cardboard Genius, Frank Asch |
| 2007 | Apers, Mark Jansen & Barbara Day Zinicola |
| 2006 | The Fran that Time Forgot, Jim Benton |
| 2006 | Whales on Stilts!, M. T. Anderson |
| 2005 | The Supernaturalist, Eoin Colfer |
| 2004 | Escape from Memory, Margaret Peterson Haddix |
| 2003 | Andrew Lost (entire series), J. C. Greenburg |
| 2002 | Beatnik Rutabagas from Beyond the Stars, Quenin Dodd |
| 2001 | The Power of UN, Nancy Etchemendy |
| 2000 | I Was a 6th Grade Alien, Bruce Coville |
| 1999 | Star Wars: Young Jedi Knights (series), Kevin J. Anderson & Rebecca Moestra |
| 1998 | Mike Gonzo and the UFO Terror, Bill Crider |
| 1997 | Animorphs: The Message, K. A. Applegate |
| 1996 | Star Hatchling, Margaret Bechard |
| 1995 | Shape Changer, Bill Brittain |
| 1994 | Star Fleet Academy: Worf's First Adventure, Peter David |
| 1993 | Weirdos of the Universe, Unite!, Pamela F. Service |
| 1992 | My Teacher Glows in the Dark, Bruce Coville |
|
Picture Book | |
| 2015 | Max Goes to the Space Station, A Science Adventure with Max the Dog, Jeffrey Bennett, illustrated by Michael Carroll |
| 2014 | Vader's Little Princess, Jeffrey Brown |
| 2013 | Oh No! Not Again!: (Or How I Built a Time Machine to save History) (Or at Least My History Grade), Mac Barnett |
| 2012 | Earth to Clunk, Pam Smallcomb, illustrated by Joe Berger |
| 2011 | Oh No!: Or How My Science Project Destroyed the World, Mac Barnett, illustrated by Dan Santat |
| 2010 | The Swamps of Sleethe, Jack Prelutsky |
| 2009 | We're Off To Look For Aliens, Colin McNaughton |
| 2008 | Mars Needs Moms, Berkeley Breathed |
| 2007 | Night of the Homework Zombies, Scott Nickel, illustrated by Steve Harpster |
| 2006 | Captain Raptor and the Moon Mystery, Kevin O'Malley, illustrated by Patrick O'Brien |
| 2005 | Science Verse, Jon Scieszka, illustrated by Lane Smith |
| 2004 | Hazel Nutt: Mad Scientist, David Elliott, illustrated by True Kelley |
| 2003 | Star Wars Episode II: Attack of the Clones - Incredible Cross-Sections, Curtis J. Saxton, illustrated by Hens Jenssen & Richard Chasemore |
| 2002 | Baloney (Henry P.), Jon Scieszka, illustrated by Lane Smith |
| 2001 | Rex, Robert Gould & Kathleen Duey, illustrated by Eugene Epstein |
| 2000 | Hush, Little Alien, Daniel Kirk |
| 1999 | Noah and the Space Ark, Laura Cecil, illustrated by Emma Chichester Clark |
| 1998 | Floating Home, David Getz, illustrated by Michael Rex |
| 1997 | Grandpa Takes Me to the Moon, Timothy R. Gaffney, illustrated by Barry Root |
| 1996 | Insects from Outer Space, Frank Asch & Vladimir Vagin, illustrated by Vladimir Vagin |
| 1995 | Time Flies, Eric Rohmann |
| 1994 | Richie's Rocket, Joan Anderson, illustrated by George Ancona |
| 1993 | June 29, 1999, David Wiesner |
| 1992 | Time Train, Paul Fleishman, illustrated by Clarie Ewart |
|
Special Award | |
| 2008 | Stone Arch Books, quality SF graphic novels to attract young SF fans |
| 2008 | World of Science Fiction, John Hamilton |
| 2007 | Write Your Own Science Fiction Story, Tish Farrell |
| 2006 | “Rolling Stones”, Bruce Coville & Full Cast Audio Family |
| 2000 | J. K. Rowling |
| 1999 | Garth Nix |
| 1998 | Kipton and the Android, Charles Fontenay |
|
Special Award: Best Science and Technology Education | |
| 2003 | Tales of the Wonderzone (entire series), Julie E. Czerneda, ed. |