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Response to Intervention (RtI) model is a multi-tier method for preventing and identifying learning disabilities (LD). The National Center on Response to Intervention1 defined the four essential components of RtI: a) multi-level instructional and behavioral system for preventing school failure; b) universal screening; c) progress monitoring; and d) data-based decisions. The first step in the multi-level process is the identification of children at risk for LD using universal screening with all students. Curriculum-Based Measurement (CBM) is the most commonly used assessment tool, both for universal screening and progress monitoring of foundational skills (i.e., reading, writing, and math), tracking student’s performance academic areas in which the student does not reach the basic goals established in the school curriculum2. Universal screening is defined as a systematic assessment of a population to identify those individuals who are at risk3.
In the context of the RtI model, universal screening is performed in the general classroom as a first step in identifying students at risk of not meeting the standards of performance required in one or more academic areas4. Universal screening is generally conducted three times per school year (e.g., fall, winter, and spring)5,6. Different classification criteria have been used to select the best cut-off score to identify low performance and at-risk students for reading, math, and writing, ranging from 10th percentile to 35th percentile7,8 or 40th percentile9. However, the most commonly used to detect at-risk students have been the 20th and 25th percentiles10,11.
Students detected at risk for learning problems or students not showing an adequate response to the core instruction are selected to receive more intense instruction in subsequent tiers12. According to Deno13, the use of CBM allows teachers and other education professionals to determine whether students benefit adequately from the intervention program that is received in the ordinary classroom.
An ideal screener should be practical; in other words, it must be low-cost, brief, easy to administrate, score, and interpret and be tied to the instruction14. Due to the need for CBMs to be repeatedly administered to the students, they must include alternate forms, which should be easily and rapidly administered by teachers. CBMs are designed based on literature evidence and the local curriculum and must be standardized, reliable, and valid13,15 , providing teachers with an efficient and brief tool in order to determine students’ risk status16,17, and assess intervention effectiveness18,19. In this regard, CBMs must meet several technical features: reliability, criterion validity, classification accuracy, and growth rate detention. To meet the need for screening critical reading, writing, and math abilities of Spanish monolingual-children within the context of the RtI model, the following CBMs were designed.