| 1001 Writing Projects for Students | — | Ela | Grades 3–12 | Traditional |
| 100 Gentle Lessons in Letters & Sounds: Level 0 | A Gentle Feasthttps://agentlefeast.com/ | Ela | Grades Pre-K–K | Charlotte Mason |
| 100 Gentle Lessons in Sight & Sound: Level 1 and Level 2 | — | Ela | Grades 1–2 | Charlotte Mason |
| 95 Phonics Core Program | 95 Percent Group | Ela | Grades K–2 | Traditional |
| ABC See, Hear, Do Series | Playful Learning Presshttps://www.abcseeheardo.com/ | Ela | Grades Pre-K–1 | Traditional |
| ABeCeDarian Reading Program | The ABeCeDarian Company | Ela | Grades K–6 | Traditional |
| A Beka Handwriting Program | Abeka | Ela | Grades Pre-K–3 | Traditional |
| Abeka Language series | Abeka | Ela | Grades 3–12 | Traditional |
| A Beka Literature for Senior High | — | Ela | Grades 9–12 | Traditional |
| A Beka Readers for grades 1 through 8 | Abeka | Ela | Grades 1–8 | Traditional |
| A Beka Spelling | — | Ela | Grades 1–12 | Traditional |
| AceReader | — | Ela | Grades 3–12 | Mastery Based |
| Adams-Gordon's Spelling Power | — | Ela | Grades 3–12 | Mastery Based |
| Advancing Through Grammar | TeachersPayTeachers.com - Marshhttps://www.teacherspayteachers.com | Ela | Grades 9–12 | Classical |
| Adventures in Phonics, Levels A, B, and C | — | Ela | Grades K–2 | Traditional |
| Aesop's Fables: My Book About Reading, Writing, Thinking | Royal Fireworks Press | Ela | Grades 2–4 | Classical |
| Age 5-7 Reading | Beyond the Pageinfo@movingbeyondthepage.comhttps://www.movingbeyondthepage.com | Ela | Grades K–2 | Traditional |
| Age 6-8 Reading | Beyond the Pageinfo@movingbeyondthepage.comhttps://www.movingbeyondthepage.com | Ela | Grades 1–3 | Traditional |
| A Handbook for Reading | Abeka | Ela | Grades K–1 | Traditional |
| A Landscape with Dragons | Ignatius Press | Ela | Grades Pre-K–12 | Traditional |
| All About Reading | All About Learning Press, Inc. | Ela | Grades Pre-K–4 | Traditional |
| All About Spelling | All About Learning Press, Inc. | Ela | Grades 1–12 | Classical |
| All-in-One Straightforward English Series Master Book | Garlic Press | Ela | Grades 3–12 | Traditional |
| Alphabet Woods Game | SimplyFun | Ela | Grades K–4 | Unschooling |
| Alpha Omega Language Arts 1 | Alpha Omega Publications | Ela | Grade 1 | Traditional |