rti for reading difficulties in the primary grades - Children's Learning ...

When to Begin Tier 2?• Researchers have tested models that begin Tier2 in kindergarten (e.g., O’Connor et al., 2005),fall of first grade (e.g., Mathes et al., 2005), andwinter of first grade (e.g., Denton et al., inpress)• Kindergarten may be a ―window of opportunity‖(Coyne et al., 2004; Simmons et al., 2008) butit can be hard to accurately identify kindergartenstudents who need supplemental intervention(Jenkins, Hudson, & Johnson, 2007).Need for Research