Chesapeake STEM Academy - ELA 9-10
Growth Above Replacement
The metric that replaces one-off observations with continuous, standards-aligned evidence of teacher impact. No clipboard required.
What is GAR?
GAR (Growth Above Replacement) measures how much better students perform with a given teacher or tool compared to a baseline expectation -- like WAR in baseball, but for learning. Instead of binary 'effective/ineffective' ratings, GAR shows continuous growth evidence from real session data.
0
class avg GAR
0%
mastery rate
0
archetypes tracked
Traditional vs. GAR
Traditional Evaluation
Observations per year1-2
Total classroom data45-90 min
Students measured~25 (one snapshot)
Data points per teacher8-12 checkboxes
Growth signalNone
FrequencyAnnual
GAR (Gregarious)
Data collectionContinuous, every sprint
Total classroom dataEvery student, every session
Students measuredAll enrolled students
Data points per teacherDesigned to collect rich data per semester
Growth signalStudent-years above baseline
FrequencyReal-time
Class Mastery Map - Chesapeake STEM Academy, Period 3
| Student | RL.9-10.1 | RL.9-10.2 | W.9-10.1 | L.9-10.4 | GAR | Archetype |
|---|---|---|---|---|---|---|
| Maya Okonkwo | 92% | 88% | 95% | 81% | 1.47 | Achiever |
| Jordan Reyes | 85% | 90% | 72% | 88% | 1.31 | Sprinter |
| Priya Nair | 80% | 84% | 78% | 91% | 1.28 | Achiever |
| Alex Kowalski | 71% | 65% | 82% | 60% | 0.94 | Stalled |
| Sam Patel | 60% | 55% | 48% | 70% | 0.87 | At Risk |
| Riley Monroe | 88% | 92% | 95% | 90% | 1.52 | Achiever |
| Avery Diaz | 77% | 80% | 73% | 68% | 1.05 | On Track |
| Devon Washington | 93% | 87% | 91% | 85% | 1.44 | Achiever |
| Chloe Fitzgerald | 55% | 60% | 52% | 58% | 0.76 | At Risk |
| Marcus Bell | 82% | 78% | 86% | 89% | 1.19 | On Track |
85%+
70-84%
55-69%
Below 55%
Achiever
Consistent growth above baseline. GAR 1.2+.
On Track
Steady growth at or near baseline. GAR 0.9-1.2.
Sprinter
Strong bursts, inconsistent engagement. GAR variable.
At Risk
Declining or stalled growth. Needs intervention. GAR below 0.9.
Stalled
Inconsistent session activity. Data insufficient for reliable GAR.
What does this mean?
Interested in GAR for your school?
Gregarious is in active development. Reach out to learn more about how GAR works and what the research shows.