This table demonstrates research I conducted after discovering a correlation between student lexile levels given through Istation assessments and their performance on STAAR. With a more than 80% accuracy, if the student's lexile level was above the average Lexile level of the test, the student passed (removing dyslexic students from the group as no accommodation are supplied through Istation's software).
Fourth grades' yearly Lexile measures are fairly consistent, making predictions and measuring students' reading progress in a real, applicable way.
Use this chart by measuring your students' Lexile levels against the predicted averages to foresee who will likely pass and who will not. It will also give fairly accurate insights into just how far each student is behind or above their anticipated levels.