The best alternatives to Starwords are Litnerd, Wikids, and Reading List. If these 3 options don't work for you, we've listed a few more alternatives below.
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Litnerd is an online classroom reading program that brings books to life by blending the creator economy to traditional education. Programs include episode reenactments of books, ELA lesson plans, curriculum and ebooks.
Wikids let kids explore independently, with categories such as: Animals, space, countries, foods, the human body and much, much more! All entries are 80-words long, narrated with a friendly voice, with text and images. Our entries are interrelated, so kids can explore on their own and continuously nurture their natural thirst for knowledge.
Reading List is an iPhone and iPad app to help readers track what they are reading and plan what to read next. Managing your books in Reading List is fast and effortless, and all data is privately held and freely exportable.