Episode #116 features a description of how and why to use core vocabulary (high frequency words) as the basis for an augmentative/alternative communication system.
The entire episode was generated using only "Frequently Occurring Home and School Words" from the list generated in the article "Vocabulary-Use Patterns in Preschool Children: Effects of Context and Time Sampling" by Christine A. Marvin, David R. Beukelman, and Denise Bilyeu published in Augmentative and Alternative Communication, Volume 10 in December, 1994.
The episode demonstrates that using only high frequency words users can still elicit complex, generative language.
You might find it beneficial to listen to the episode twice or to read along as you listen to the episode. TRANSCRIPT: http://bit.ly/howtohelpsaythingstranscript