| Title | Approval Date | Quiz No. | Interest Level | Readability Level (ATOS) | Points | F / N/F | Language | Lexile Code | Reader Measure | Level | Genre | Words |
| Amy’s Light | 6/24/11 | 144006 | LG | 3.6 | 0.5 | F | EN | AD | 970 | M | RF | 380 |
| Ancient Rhymes | P | F | 171 | |||||||||
| Around One Cactus | 12/17/03 | 72436 | LG | 6.1 | 0.5 | N/F | EN | NP | N | I | 250 | |
| Around One Log | 7/26/11 | 144480 | LG | 5.9 | 0.5 | N/F | EN | AD | 930 | O | I | 250 |
| Baby on Board | AD | 880L | ||||||||||
| Bajo Las Olas | 8/14/01 | 47728 | MG | 5.1 | 1 | F | SP | |||||
| The BLUES Go Birding Across America | 5/6/10 | 137258 | TBD | AD | 600 | N | F | 3700 | ||||
| The BLUES Go Birding At Wild America’s Shores | AD | 610 | N | F | 3700 | |||||||
| The BLUES Go Extreme Birding | AD | 760 | N | F | 3700 | |||||||
| Because Brian Hugged His Mother | 6/3/02 | 57971 | LG | 4.5 | 0.5 | F | EN | 710 | ||||
| Born With a Bang | 6/28/02 | 58173 | LG | 4.6 | 1.5 | N/F | EN | 730 | W | I | 2903 | |
| Dandelion Seed | 2/20/98 | 17519 | LG | 2.4 | 0.5 | F | EN | AD | 490 | M | F | 252 | Daytime Nighttime, All Through the Year | AD | 970L |
| Do Animals Have Feelings, Too? | 7/8/02 | 58371 | LG | 5.8 | 1 | N/F | EN | S | I | 250 | ||
| Drop Around the World | 7/8/02 | 58363 | LG | 5.1 | 0.5 | N/F | EN | 820 | P | I | 1248 | |
| Earth Heroes: Champions of the Ocean | 1060 | W | B | 32785 | ||||||||
| Earth Heroes: Champions of the Wilderness | 5/24/11 | 143517 | MG | 7.2 | 5 | N/F | EN | 960 | V | B | 250+ | |
| Earth Heroes: Champions of Wild Animals | 4/29/11 | 143398 | MG | 7.7 | 6 | N/F | EN | 990 | ||||
| For Baby (For Bobbie) | O | RF | 185 | |||||||||
| Forest Bright, Forest Night | 700 | L | I | 470 | ||||||||
| Forever Forest, The | 950 | |||||||||||
| From Lava to Life | 7/15/03 | 68789 | LG | 4.9 | 0.5 | N/F | EN | 790 | W | I | 3586 | |
| Gobble, Gobble | 9/1/11 | 145682 | LG | 3.4 | .5 | F | EN | AD | 500 | M | RF | 169 |
| Going Around the Sun | 4/21/09 | 127214 | LG | 4.8 | 0.5 | N/F | EN | AD | 640 | M | F | 838 |
| Going Home | 5/18/10 | 137199 | LG | 5.3 | 0.5 | N/F | EN | AD | 790 | O | I | 930 |
| Granny’s Clan | 10/3/12 | 153670 | LG | 4.4 | 0.5 | N/F | EN | AD | 690 | |||
| Green Bean Green Bean! | 5/3/16 | 180996 | LG | 1.4 | 0.5 | F | EN | AD | 690 | |||
| How We Know What We Know About Our Changing Climate | 5/5/09 | 126831 | MG | 8.4 | 3 | N/F | EN | 1170 | Y | I | 250 | |
| If You Give a T-Rex a Bone | N | I | 842 | |||||||||
| If You Love Honey | 7/12/16 | 182721 | LG | 4.5 | 0.5 | N/F | EN | N | I | 842 | ||
| If You Were My Baby | 1/6/06 | 102253 | LG | 3 | 0.5 | F | EN | L | F | 338 | ||
| In a Nutshell | 5/13/02 | 57977 | LG | 3.2 | 0.5 | F | EN | AD | 540 | L | I | 250 |
| In One Tidepool | 2/7/03 | 62773 | LG | 5.3 | 0.5 | N/F | EN | NP | P | I | 937 | |
| In the Trees, Honey Bees | 6/24/10 | 137508 | LG | 4.4 | 0.5 | N/F | EN | AD | 650 | M | I | 81 |
| Inside All | K | I | 110 | |||||||||
| Jo MacDonald Had a Garden | AD | 550 | ||||||||||
| Jo MacDonald Hiked in the Woods | AD | 760 | ||||||||||
| Jo MacDonald Saw a Pond | AD | 620 | J | TL | 412 | |||||||
| John Muir: My Life With Nature | 7/8/02 | 58233 | MG | 6 | 1 | N/F | EN | 960 | ||||
| Lifetimes | 8/27/02 | 59480 | MG | 5.3 | 0.5 | N/F | EN | AD | 770 | Q | I | 250 |
| Little Brother Moose | 7/8/02 | 58376 | LG | 2.8 | 0.5 | F | EN | |||||
| Mammals Who Morph | 1/22/07 | 109145 | LG | 4.7 | 0.5 | N/F | EN | 750 | W | I | 3950 | |
| Mighty Mole and Super Soil | 6/28/16 | 181922 | LG | 3.7 | 0.5 | F | EN | 750 | W | I | 3950 | |
| Molly’s Organic Farm | 6/28/12 | 151791 | LG | 2.9 | 0.5 | F | EN | AD | 680 | |||
| Moon of My Own | AD | 370 | ||||||||||
| The Mouse and the Meadow | 7/3/14 | 165343 | LG | 5 | 0.5 | F | EN | AD | 890 | |||
| Nature’s Patchwork Quilt | 10/9/12 | 153671 | LG | 4.7 | 0.5 | N/F | EN | AD | 890 | |||
| Near One Cattail | 6/14/05 | 86616 | LG | 5.5 | 0.5 | N/F | EN | NP | P | I | 946 | |
| Noisy Bird Sing-Along | 8/5/15 | 174762 | LG | 2.9 | 0.5 | N/F | EN | NP | P | I | 946 | |
| Noisy Bug Sing-Along | 10/23/13 | 158733 | LG | 1.7 | 0.5 | N/F | EN | AD | 590 | |||
| Noisy Frog Sing-Along | AD | 570 | ||||||||||
| Octopus Escapes Again | AD | 650 | ||||||||||
| On Kiki’s Reef | 4/28/14 | 165336 | LG | 3.5 | 0.5 | F | EN | AD | 700 | |||
| On One Flower | 1/19/07 | 108908 | LG | 4.9 | 0.5 | N/F | EN | NP | O | RF | 990 | |
| Over In Australia | 4/15/11 | 142782 | LG | 2.9 | 0.5 | N/F | EN | AD | 660 | M | F | 250+ |
| Over in a River | 5/8/14 | 162424 | LG | 3.1 | 0.5 | F | EN | AD | 660 | |||
| Over in the Arctic | 10/14/08 | 124082 | LG | 3 | 0.5 | F | EN | AD | 650 | M | F | 462 |
| Over in the Forest | 6/26/12 | 151799 | LG | 4.1 | 0.5 | F | EN | AD | 620 | |||
| Over in the Grasslands | AD | 640 | ||||||||||
| Over In The Jungle | 6/1/07 | 113891 | LG | 2.8 | 0.5 | N/F | EN | AD | 610 | M | F | 427 |
| Over in the Ocean | 10/27/04 | 80869 | LG | 2.7 | 0.5 | F | EN | AD | 600 | M | F | 431 |
| Over on a Mountain: Somewhere in the World | 6/4/15 | 174226 | LG | 3.1 | 0.5 | F | EN | AD | 600 | M | F | 431 |
| Pass the Energy, Please! | 6/3/02 | 57982 | LG | 5.4 | 0.5 | N/F | EN | 1010 | P | I | 1617 | |
| Pitter and Patter | 5/8/15 | 173451 | LG | 1.8 | 0.5 | F | EN | 1010 | P | I | 1617 | |
| Prairie that Nature Built | 8/5/15 | 174767 | LG | 5.1 | 0.5 | N/F | EN | 1010 | P | I | 1617 | |
| Saguaro Moon | 2/25/03 | 62780 | MG | 5.1 | 1 | N/F | EN | IG | 840 | |||
| Salmon Stream | 6/22/01 | 48204 | MG | 5.6 | 0.5 | N/F | EN | IG | 850 | M | I | 586 |
| Seashells by the Seashore | 5/3/02 | 57959 | LG | 2.2 | 0.5 | F | EN | NP | L | RF | 441 | |
| Stickeen | 11/16/99 | 31675 | LG | 4.4 | 0.5 | N/F | EN | |||||
| Swamp Where Gator Hides | AD | 680 | ||||||||||
| Swim Through The Sea | 6/28/02 | 58171 | MG | 6.5 | 0.5 | N/F | EN | Q | I | 170 | ||
| Tall Tall Tree | AD | 620L | ||||||||||
| There’s a Bug on My Book! | AD | 460L | ||||||||||
| Tree in the Ancient Forest | 9/18/97 | 16200 | MG | 5.5 | 0.5 | F | EN | M | I | 586 | ||
| This is the Sea that Feeds Us | 6/20/00 | 32566 | LG | 5.5 | 0.5 | F | EN | N | I | 551 | ||
| Under One Rock | 11/26/01 | 53923 | LG | 4 | 0.5 | N/F | EN | NP | O | I | 950 | |
| Walk In The Rainforest | 5/9/02 | 53417 | MG | 6 | 0.5 | N/F | EN | IG | 950 | |||
| What’s in the Garden? | AD | 710 | ||||||||||
| Wild Ones: Observing City Critters | 7/12/16 | 180055 | LG | 3.7 | 0.5 | F | EN | AD | 710 | |||
| Wonderful Nature, Wonderful You | AD | 620L |
