Collaborative-teaching (co-teaching) is an instructional arrangement where two or more certified professionals share the responsibility of:

• lesson planning (incorporating one or more of the 4 highly effective co-teach models)
• instructing (using the planned co-teach model(s))
• monitoring student progress (through a balanced assessment system)
• adjusting the delivery of instruction based on students' needs/progress
• providing differentiated instruction, interventions, and enrichment
• collecting academic and behavioral data to meet individual student needs for all students.