Firefly & Fern

Teresa Audesirk, Bruce E. Byers

Ages 15–18life sciencesscientific inquiry

Ages 12–15scientific inquirynature

Darlene R. Stille, Carol Ryback

Ages 7–12sciencebiology

Albert Kaskel, Sharon Daniel, Ronald S. Daniel

Ages 13–18sciencelife sciences

Ages 12–15sciencebiology

Alton L. Biggs, Whitney Crispen Hagins, William G. Holliday

Ages 12–15sciencelife sciences

Michael J. Padilla, Barbara Brooks Simons, Thomas R. Wellnitz

Ages 11–14sciencediscovery

George B. Johnson, Peter H. Raven

Ages 14–18sciencebiology

Doug C. Eldon, Dorry Eldon, Bobby Horton

Ages 4–10biologyanimals

Albert Kaskel, Paul, Jr. Hummer, James E. Kennedy, Raymond F. Oram

Ages 12–15scientific inquiryexperimentation

Jame Trefil, Rita Ann Calvo, Kenneth, Ms. Cutler

Ages 12–15science inquirylife sciences

Ages 14–18scientific inquirylife sciences

Ages 12–15sciencenature

A. G. Toole, Glenn Toole, Susan Toole

Ages 14–18life sciencesscientific understanding