The artifact-based instrument will be develop by the partnership
through a modification of an existing instrument called the
Teacher Instructional Portfolio (Saxton & Rigelman, unpublished).
The Teacher Instructional Portfolio is designed to measure full
instructional units and creates a rich data set around instructional
practices that covers more than one lesson allowing for the
exploration of connections across lessons and progression of instruction. In order to scale up the use of this instrument to
school-wide transformation efforts, the instrument will be
modified to document 3–5 days of practice. While classroom
observations and artifact-based instruments measure some similar
instructional practices to create data triangulation, they also each
measure distinct practices creating breadth of coverage of the
construct definition (Martinez et al., 2012).