easyCBM NCTM Math is an assessment that for grades K-6 that can be used for benchmark screening. The instrument, developed by University of Oregon, is aligned with the National Council for Teachers of Mathematics Focal Points and is available in English and Spanish.
Testing materials are free to download: https://dibels.uoregon.edu/assessment/index/material/; DDS Standard service (inlucdes easyCBM NCTM Math): $1 per student per year.
Access and Use
Elliott, Stephen N.; Kurz, Alexander; Tindal, Gerald; Yel, Nedim. (2017). Influence of Opportunity to Learn Indices and Education Status on Students' Mathematics Achievement Growth. Remedial and Special Education, v38 n3 p145-158
Clarke, Ben; Nese, Joseph F. T.; Alonzo, Julie; Smith, Jean Louise M.; Tindal, Gerald; Kame'enui, Edward J.; Baker, Scott K. (2011). Classification Accuracy of EasyCBM First-Grade Mathematics Measures: Findings and Implications for the Field. Assessment for Effective Intervention, v36 n4 p243-25.
University of Oregon. (n.d.). Research : UO DIBELS Data System. Retrieved July 11, 2019, from https://dibels.uoregon.edu/research#nctm