Help students master essential phonics skills and become proficient readers An intervention resource to support RTI Tier 2 small-group interventions. This book offers targeted, hands-on practice and explicit instruction. Target instruction on diphthongs, variant consonant sounds and r-controlled vowel sounds. Includes skill-focused centers with written activities. Evan-Moor(R) Phonics Intervetions Centers, Variant Consonant and Vowel Sound, Grades 4-6 is one of many Classroom Teaching Resources available through Office Depot. Made by Evan-Moor.