Side by side
| Delta Math RTI | DeltaMath | |
|---|---|---|
| Website | deltamath.org | deltamath.com |
| Maker | Ottawa Area ISD (Michigan) with Alt+Shift and Michigan math consultants | DeltaMath Solutions Inc. (New York), founded by teacher Zach Korzyk |
| Started | 2007 (screeners); intervention lessons from 2014 | 2009; public for all teachers in 2010 |
| Purpose | Screen for unfinished prior-grade learning and deliver tiered intervention | Assign and auto-grade randomized practice on current skills |
| Grades | Kindergarten through Algebra 2 | Elementary through AP Calculus (strongest 6–12) |
| Core components | Readiness screeners, standards-based reports, Tier 2/3 lessons, Quick Checks, Growth Charts | Skill library, assignments, Show Example / Show Solution, videos, tests, data views |
| Who uses it | Grade-level teams, interventionists, MTSS coordinators | Classroom teachers and their students; families via DeltaMath for Home |
| Cost | Distributed through ISDs and professional learning; see deltamath.org | Free tier; PLUS $95 and INTEGRAL $145 per teacher-year; site licenses |
How Delta Math RTI works
The program is built around the idea that students struggle with grade-level math when prerequisite standards from earlier grades are unfinished. Rather than ranking students by percentile, its screeners test specific readiness standards (end-of-year benchmarks from the previous grade) so a team can see exactly which skills each student is missing.
Screening cycle
- Fall (Aug 15 – Oct 31): Tier 2 readiness screener for all students; Tier 3 screener for students not responding to Tier 2 intervention.
- Winter: Tier 2 readiness screener again after support has been provided for each readiness standard, plus a Tier 1 screener at the end of February.
- Screeners are online, take 15–25 minutes, and report results immediately.
Reports
The Standard Summary Report shows which readiness standards a grade level needs to work on; the Intervention Group Report schedules small, flexible groups per standard. Teams use these in data meetings and parent-teacher conferences.
Tiered intervention
- Tier 2: 8-session cycles per readiness standard, roughly 30 minutes each, 3–5 days per week, with explicit systematic instruction, visual representations, daily progress monitoring (Quick Checks), and goal-setting (Growth Charts). Students can exit after meeting the goal three times.
- Tier 3: 8-session cycles for students who did not respond to Tier 2, based on a Tier 3 screener that locates where learning discontinued. Early exit is not recommended.
- Distributed practice: Additional Guided Practice forms A/B/C, Visual Fluency Cards, Independent Practice Activities, and online practice for grades 1 through Algebra 2 readiness standards.
Lessons integrate recommendations from the Institute of Education Sciences practice guide on math intervention. Pre-teaching lessons exist for grades 1 through Algebra 1 and an instructional routine with online practice through Algebra 2.
How DeltaMath.com handles intervention
DeltaMath is not an RTI program, but teachers do use it for remediation in three ways:
- Skill-specific assignments. Because the library reaches back to elementary arithmetic, a high school teacher can assign fraction operations or integer rules to the students who need them.
- Data views. Every attempt, correct or not, plus time per problem, is visible per student and per skill, which identifies who is stuck where.
- INTEGRAL reports. Standards-based performance reports and pushed diagnostic assignments on site licenses give department-level views, the closest DeltaMath comes to a screener.
Where to go next
- For Delta Math RTI resources, videos, and the implementation guide, start at the Ottawa Area ISD's “Getting to Know Delta Math” page or Alt+Shift's Delta Math course listing.
- For DeltaMath.com, this site covers login, student accounts, how grading works, and skill guides.