Just like in Study 1, an analysis of implementation quality was conducted. Eight instructional practices were assessed:

• A) Knowledge goals for instruction
• B) Science integrated with reading
• C) Autonomy support
• D) Use of interesting texts
• E) Collaboration support
• F) Self-efficacy support
• G) SI
• H) Program control (use of basal materials and instructional activities suggested in the basal)

The eighth practice of program control was added to Study 2. Findings show that CORI teachers scored higher than SI and TI teachers on the implementation of four out of the five instructional practices that define the CORI framework, including knowledge content goals, science integration, autonomy support, and collaboration support. However, CORI teachers scored lower than TI teachers on the use of interesting texts. In Study 2, the only difference is that CORI teachers scored higher than SI in support of self-efficacy.