Instructional Materials Provides definitions of text levels and a method for calculating a text's difficulty. Taken from Effective Instruction for Secondary Struggling Readers: Research-Based Practices. Text_difficulty.pdfCategory: InstructionReading InstructionUsing DataUsing Data for Instructional PlanningRelated Resources: Instructional Materials Fluency: Text Reading Levels Defines independent, instructional, and frustrational levels. Also describes how to calcluate a student's reading accuracy percentage. Instructional Materials Fluency: Calculating Oral Reading Fluency (ORF) Directions for computing a student’s words correct per minute (wcpm) score after doing an oral reading fluency (ORF) check.