Illinois recognizes the need for a common, standards- and performance-based assessment of teaching effectiveness that measures the classroom readiness of teacher candidates and provides information for program improvement. The edTPA is designed to ensure that those who become teachers not only understand educational theory and subject matter content, but can demonstrate their ability to lead a classroom and support students in their learning. New teachers have to be effective from day one.
The edTPA is a performance-based, subject-specific assessment that measures effectiveness in the classroom by focusing on student learning. The edTPA uses processes similar to National Board certification insofar as candidates are required to provide evidence of their practice through the submission of video and other artifacts.
For more info see the document below.