© 2025 Vista Higher Learning Reading and Writing Growth with Vista’s Engage 14 Table 4 reports average reading and writing score changes by grade, showing statistically significant improvement across the board. Table 4 Pre- to Post-Instruction Growth by Grade (AZELLA Reading and Writing) Every grade demonstrated measurable gains; reading e ects were moderate overall. Grade 11 demonstrated the strongest gains. Figure 2 highlights combined reading score gains from fall to spring. Reading scores increased across all grades following Engage instruction. Figure 2: Average Reading Scores Before and After Engage Instruction Skill Area Grade Level N Pre- Instruction Mean Pre- Instruction SD PostInstruction Mean Post- Instruction SD PrePost Mean Di SD Mean di erence (corrected for corr) T Significance Cohens D (corrected for corr) Reading 9 92 179.51 40.99 192.78 36.15 13,27 31.55 4.0 <.001 .34 10 39 179.15 35.25 196.85 41.30 17.69 29.63 3.7 <.001 .45 11 21 196.57 42.47 217.0 43.89 20.43 20.42 4.6 <.001 .47 12 19 221.95 38.33 237.63 49.15 15.68 28.09 4.4 <.001 .33 Total 171 186.24 41.67 201.67 42.25 15.43 42.06 9.3 <.001 .37 Writing 9 92 201.27 36.61 219.42 20,96 18.15 27.02 6.4 <.001 .53 10 39 199.23 31.17 220.36 22.88 21.13 24.12 5.5 <.001 .74 11 21 218.38 29.24 229.24 25.21 10.86 16.64 3.0 <.001 .39 12 19 228.84 18.74 239.63 23.19 10.79 10.65 2.4 =.013 .47 Total 171 205.97 34.24 223.09 22.98 17.12 31.80 6.9 <.001 .54 Pre Instruction; 186,24 Post Instruction; 201,67 180 185 190 195 200 205 Pre Instruction Post Instruction AZELLA Scaled Score Test Timing Pre Instruction Post Instruction
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