Inclusion Criteria:  Enrolled as a student at AppleTree Institute or The Maddux School  Chronological age between 3-6 years at enrollment English as a primary language Not deemed "at risk" for expressive language difficulties on AppleTree Pre-Literacy Assessment (i.e., roughly age-appropriate core language skills) Identified by school staff as having problems with flexibility  Exclusion Criteria:  No longer enrolled at AppleTree Institute or The Maddux School  • Insufficient English fluency or language skills to complete intervention