Core Kit: Implementation Tier 2 & 3 Support Videos Implementation: General Tips Implementation: Tier 2 & 3 Intervention: Differentiated Intervention Parent Letter Optional parent information letter for tier two and three intervention. Exploratory Play The first time students use Bond Blocks they will need to engage in Introductory Play before commencing Core Kit activities. Support Book Click to open in a new tab: Tier Two & Three Intervention Implementation Support Book Tier 2 & 3 Intervention Implementation Planner