Here is a link to a summary of findings for the Math measures (NCTM Math and CCSS Math): http://www.brtprojects.org/wp-
In the Math summary report, you will see that alignment was gauged for both on- and prior-grade TEKS. In the Reading report, just on-grade TEKS were examined. Strength of alignment was rated on a scale of 0 to 2, where: 0 = not aligned, 1 = somewhat aligned, and 2 = directly aligned. The decimal values reported for alignment reflect this scale, typically across all items at a given TEKS grade-level. Reported %s typically indicate the proportion of grade-level TEKS addressed by that particular grade-level/content area easyCBM assessment.
This information, while not item-level, might help one efficiently ascertain which TEKS can be targeted by the different easyCBM benchmark (and by proxy, progress-monitoring) assessments.