![](https://cdn.shopify.com/s/files/1/0071/0960/7481/files/PVBR-LogicModelsHeader_1600x500-1701891012098.png)
ESSA Tier 4 requires a rationale, or logic model, which is a well-specified conceptual framework of the program and its desired outcomes. All of our products were developed around a clear logic model, and we have ongoing studies in place based on these frameworks.
![](https://cdn.shopify.com/s/files/1/0071/0960/7481/files/IT_LM_thumb_cff19661-bcd7-43f4-8210-62513ab0178d_160x160.png?v=1701975254)
Logic Model: In Tandem [PDF]
![](https://cdn.shopify.com/s/files/1/0071/0960/7481/files/PL_LM_thumb_6fe86bb9-60a8-4edc-8adf-2b36b7f47220_160x160.png?v=1701975254)
Logic Model: Phonics Launch [PDF]
Logic Model: Stepping Together [PDF]