| 100+ Easy and Fun Creative Nature Walks | Our Journey Westwardhttps://ourjourneywestward.com/ | Science | Grades Pre-K–12 | Charlotte Mason |
| 101 Hands-On Science Experiments | — | Science | Grades 4–7 | Inquiry Based |
| 40 Nature Walks: Outdoor Science Labs On-the-Go | — | Science | Grades 7–13 | Charlotte Mason |
| 42 Electronics | — | Science | Grade 10 | Traditional |
| 4-H Curriculum | National | Science | Grades 3–12 | Inquiry Based |
| A Beka Health Courses | Abeka | Science | Grades 4–12 | Traditional |
| A Beka Science: grades 1-6 | Abeka | Science | Grades 1–6 | Traditional |
| AC Home: Science | Adaptive Curriculumhttps://www.adaptivecurriculum.com | Science | Grades 5–12 | Traditional |
| Action Science Physical Science | Action Sciencehttps://action-science.com/ | Science | Grades 6–8 | Inquiry Based |
| Activate Learning Certified Version of OpenSciEd | Activate Learning | Science | Grades 6–8 | Inquiry Based |
| African Animals Diamond Art and Unit Studies | Teaching Toyshttps://teaching.toys | Science | Grades 4–12 | Unschooling |
| Alice Programming | — | Science | Grade 9 | Eclectic |
| Alison | — | Science | Grade 9 | Student Led |
| Along Came Galileo | Beautiful Feet Bookshttps://bfbooks.com | Science | Grades 3–8 | Literature Based |
| American Science and Surplus | American Science and SurplusP.O. Box | Science | All Grades | Inquiry Based |
| Amplify Science | Amplify | Science | Grades K–8 | Inquiry Based |
| An Insider's Guide to Successful Science Fair Projects | Media Angels, Inc.http://www.mediaangels.com | Science | Grades 6–12 | Traditional |
| A Pocketful of Wonder: 50 Hands-On Adventures for Kids to Discover God’s Creation | Bethany Househttps://bakerpublishinggroup.com/bethanyhouse | Science | Grades Pre-K–2 | Charlotte Mason |
| Apologia's Exploring Creation Series (elementary grades) | Apologia Educational Ministries | Science | Grades K–6 | Charlotte Mason |
| AppInventor | — | Science | Grade 5 | Student Led |
| Archimedes and the Door of Science | Bethlehem Books | Science | Grades 3–8 | Literature Based |
| A Reason for Science | The Concerned Group | Science | Grades 1–8 | Inquiry Based |
| Astronomy and the Bible: Questions and Answers, 2nd edition | BMH Books | Science | Grades 5–12 | Traditional |
| Awesome Science DVDs | — | Science | Grades 5–9 | Blended |
| A Year of Discovery | Science Through Naturehttps://sciencethroughnature.com/explorer/ | Science | Grades 1–4 | Classical |