<Li> To estimate rates of student improvement </Li> <P> Three tiers of Scientifically Research - Based Interventions (SRBIs) of increasing intensity incorporate the key components of RTI and help ensure the academic growth and achievement of students . </P> <P> The first tier states that all students receive core classroom instruction that is differentiated and utilizes strategies and materials that are scientifically research - based . Assessment in the classroom should be ongoing and effective in that it clearly identifies the strengths and weaknesses for each learner . Any necessary interventions at this level are within the framework of the general education classroom and can be in the form of differentiated instruction, small group review, or one - on - one remediation of a concept . </P> <P> Progress monitoring in Tier 1 uses universal screening assessments to show individual student growth over time and to determine whether students are progressing as expected . In this process, data are collected, students are identified using benchmark scores, and measurable goals are set for the next data collection point for those who display difficulties . The team then follows a problem - solving process to determine interventions for at - risk students that will work within whole - class instructions . The classroom teacher implements the interventions, observations are conducted to ensure the fidelity of the classroom instruction, and the problem - solving team periodically reviews the progress of students . </P>

A response to intervention (rti) program involves three tiers. during the first tier students