Complete The Words
From the description:
Complete the words has a proven track record in schools to improve spelling and writing performance.
The fun way to improve kids ABC, alphabet, letters and spelling whilst keeping them amused for hours.
Learn Words Series
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Academic Apps For Kids have recently launched our first two apps: Learn Words 1 and Learn Words 2, available on the AppStore for iPad and iPhone. Both apps teach young children to read 40 words using pictures and targeted multiple choice. Our aim is to make learning fun without trying to distract with loud and flashy songs and animations. We promise a quiet and safe learning experience, so no advertisements or in-app purchases. All apps are available at the lowest price point and have a discount for educational institutions.
Move And Match
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iReadWrite
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An excellent literacy tool with many features to help those that struggle with their reading and writing. It's super customizable, includes dictionaries and a phonetic spell checker to help catch common mistakes.
LPI Essentials studieboek by Jeroen Baten
A Dutch Linux textbook, written by Jeroen Baten. Google translation:
My Spellings
My Spellings is an app that lets you practice your spelling using tests. It lets you use your voice to record the words, and then you have to type the word correctly. You can set up multiple 'tests,' and record lists of words for practice and testing, which seems like it would be incredibly useful to parents of school-aged children, or even for your own practice.