There are a number of ways to teach spelling. I want to make a few suggestions. When you are teaching spelling to young children, you have to teach phonics and the parts of a word. You can find lists of the most commonly used 100 words. Every child should know how to spell all of those words. Otherwise, children can get frustrated by spelling. If you can take the 100 or 200 most common words off the table, then you can focus on a few words at a time instead of half of the paper.
Scholar - Spelling Bee Quiz
This app teaches you to spell commonly misspelled words. It gets into similar words. The ratings are excellent and well deserved. This is a difficult subject to address. This app will help you improve your spelling if you take the time to use it.
https://itunes.apple.com/us/app/scholar-spelling-bee-quiz/id1308540467
Spelling Training
This website allows you to make a list of spelling words or import one to study. This is a nice twist to the traditional way of learning spelling.
https://www.spellingtraining.com/
Spelling Notebook
You can create a list of spelling words to practice. This app helps teach spelling.
https://itunes.apple.com/us/app/spelling-notebook/id461225509?mt=8
Simplex Spelling Phonics - Rhyming With CVC Words
This is a very good spelling app.
https://itunes.apple.com/us/app/simplex-spelling-phonics-rhyming/id580762950?mt=8&ign-
Website: http://www.pyxwise.com/ssphonicscvc.html
Little Stars - Word Wizard
This is a highly rated game that teaches spelling.
https://itunes.apple.com/us/app/little-stars-word-wizard/id521736568?mt=8
Ultimate English Spelling Quiz
Google Play https://play.google.com/store/apps/details?id=com.damtechdesigns.quiz.spelling&hl=en
Windows https://www.microsoft.com/en-us/store/apps/ultimate-english-spelling-quiz/9nblggh1r9ns
American Wordspeller
Instead of looking a word up in the dictionary you can use this app. Spelling rules do not apply. You can spell a word phonetically, and the app can find it. This is an app for those with poor spelling that needs to look up a word.
https://itunes.apple.com/us/app/american-wordspeller/id397617771?mt=8
Spell Board
This app creates fun activities to help you learn custom spelling lists.
https://itunes.apple.com/us/app/spellboard/id390290951?mt=8
Website: http://www.palasoftware.com/SpellBoard.html
YouTube.com
You can find videos of the most common 100 words and countless videos on phonics. When I show videos to students, they just focus or listen better. As much as I want to think of myself as being interesting YouTube.com tends to be more engaging interesting to my students.