Math Diagnostics. Real Connections. Better Results.
Math Diagnostics
Identify exactly where students are academically by assessing strengths, gaps, and readiness across key math domains.
Real Connections
Connect data directly to instruction, small groups, intervention plans, and the specific skills students need next.
Better Results
Use clear, actionable data to improve math instruction, close learning gaps, and support measurable student growth.
Math diagnostics that find the gap — and plug it.
The Number Plug is a computer-adaptive K–5 math diagnostic. Questions get harder when a student is right and easier when they miss, so every result pinpoints exactly which standard broke down and what to teach next.
Four diagnostic domains
Every item is tagged to a Missouri Learning Standards cluster and reports into one of four domains, so domain-level data always points back to a specific grade-level expectation.
Number Sense & Operations
Counting, place value, computation, fluency, fractions, decimals, and multi-step problem solving.
MLS: NBT — Number Sense and Operations in Base Ten
Algebraic Thinking & Patterns
Patterns, relationships, equations, variables, and explaining mathematical reasoning.
MLS: RA — Relationships and Algebraic Thinking
Geometry & Measurement
Shapes, spatial reasoning, area, perimeter, volume, time, money, and measurement.
MLS: GM — Geometry and Measurement
Data Analysis & Problem Solving
Reading graphs, interpreting tables, analyzing real-world situations, and explaining strategy.
MLS: DS — Data and Statistics
Why these four domains?
The Number Plug domains mirror the strands most strongly tied to later math success in research on early mathematics learning.
Number Sense & Operations
Proficiency with whole numbers, fractions, and place value is the strongest predictor of later algebra success. Students who build fluent number sense in K–5 are far more likely to succeed in middle-school math.
National Mathematics Advisory Panel, 2008
Algebraic Thinking & Patterns
Introducing patterns, relations, and functional thinking in the early grades improves students' understanding of core algebraic concepts later, closing gaps before formal algebra begins.
Blanton et al., Early Algebra is Not the Same as Algebra Early, 2015
Geometry & Measurement
Spatial reasoning and measurement understanding are linked to achievement in STEM fields. Early work with shapes, area, and units builds the mental models students use for advanced problem solving.
Mix & Cheng, The Relation Between Space and Math, 2012
Data Analysis & Problem Solving
Statistical reasoning and data interpretation are now essential literacies. Beginning data work in K–5 helps students ask meaningful questions, represent information, and justify conclusions.
Franklin et al., Guidelines for Assessment and Instruction in Statistics Education, 2007
Four placement levels
Scale scores are criterion-referenced — a student is measured against the standards for their grade, never ranked against classmates.
Scale score 85 – 100
At or above grade level — ready for enrichment
Scale score 70 – 84
Approaching grade level — needs targeted practice
Scale score 55 – 69
Skill gaps requiring small-group intervention
Scale score 0 – 54
Significant unfinished learning — intensive support
Three diagnostic windows
See the full cycle →Fall
CompleteBaseline Diagnostic
Administered in the first three weeks of school
Students complete the baseline diagnostic at the beginning of the school year to identify current strengths, unfinished learning, and priority skill gaps across the math domains.
Mid-Year
In progressProgress Check
Triggered near 50% plan mastery across the four core domains
This checkpoint determines whether students are responding to instruction and intervention, and identifies which skills need to be retaught, reinforced, or extended.
Spring
ScheduledMastery Check
Triggered near 75% plan mastery
The final checkpoint measures end-of-year progress, readiness for grade-level expectations, and remaining areas of need so schools can plan next steps.
Built for the whole team
Students
Take the adaptive diagnostic, see growth by domain, and get recommended lessons.
Student login code →Teachers
Build a roster, generate login codes, track domain data, and form intervention groups.
Teacher portal →Administrators
Manage accounts and roles, and view schoolwide growth against Missouri standards.
Admin portal →Criterion-referenced to Missouri, K–5
Browse every DESE grade-level expectation the diagnostic reports on — Number Sense, Base Ten, Fractions, Relationships & Algebraic Thinking, Geometry & Measurement, and Data & Statistics — mapped to the Number Plug domain that measures it.
View the standards library