RTI Velocity Tracker
Measure learning slope (weeks to mastery) per child vs population norm → predict LD before 2-3 year gap (Fuchs & Fuchs, 2006)
What is RTI Velocity?
Problem:
Traditional testing: "Is 70% good?" ❌ Not enough. Some kids with 70% are still learning well (steep curve). Others plateau (flat curve).
Solution:
Track: Weeks to mastery per child vs population average → early detection of learning disability
Child A (Typical Trajectory)
Current Week:
4
Predicted Mastery:
6 weeks
Status:
On track ✓
Child B (Slow Trajectory - Early Flag)
Current Week:
4
Predicted Mastery:
12-14 weeks
Status:
⚠️ Needs intervention
RTI Decision Criteria
✓ Population Norm (Hattie):
80% proficiency in 6-8 weeks (Hattie benchmark)
⚠️ Flagging Threshold:
If projected >10 weeks = needs additional support
→ Recommended Action:
More intensive intervention, skill prerequisite check, alternative teaching method
