Speech Spark by SFS Your go-to hub for evidence-based educational resources. Supporting SLPs, teachers, tutors, and parents with no-prep digital solutions that work. EBook Categories: Select a Category Freebie Games EBook The Sound Spelling Connection: Data Driven Guide to English Vowels $5.00 Add To Cart Added! The Vowel Playbook: Using Data to Master Vowels $5.00 Add To Cart Added! Have Questions?