Immaculate Conception School students in Grades 1-8 take the Terra Nova, a standardized test published by CTB-McGraw Hill, in the spring of each year. The chart below lists the “Total Score” attained by each grade level over the past five years. The Total Score represents the average of the scale scores in Reading, Language, and Mathematics. ICS students consistently score in the top 10 to 15% nationally.
| 2017 | 2016 | 2015 | 2014 | 2013 | |
| Grade 1 | 88% | 79% | 87% | 87% | 81% |
| Grade 2 | 80% | 82% | 86% | 81% | 84% |
| Grade 3 | 93% | 88% | 87% | 84% | 77% |
| Grade 4 | 91% | 92% | 88% | 90% | 86% |
| Grade 5 | 89% | 87% | 87% | 90% | 86% |
| Grade 6 | 91% | 87% | 87% | 89% | 90% |
| Grade 7 | 88% | 93% | 92% | 94% | 93% |
| Grade 8 | 93% | 92% | 93% | 94% | 88% |