Boardmaker Core First Learning
Tobii Dynavox offers free printable core communication books and lessons that can support you in teaching students specific core words. Check out their free resources to support vocabulary development at https://www.tobiidynavox.com/en-US/software/content/core-first/?redirect=true#CoreFirstLearning.
SnappyWords.com Dynamic Dictionary
Snappywords.com offers an online interactive English dictionary and thesaurus which helps users find the meanings of words and draw connections to associated words. Type a word in the search box to get started. See the meaning of each word by placing the mouse cursor over it.