What researchers studied

Descriptive stochastic-frontier analysis of district-level administrative and financial data from Michigan public and charter school districts across 13 academic years, 2011-12 through 2024-25. Michigan districts serving at least 500 students through high school, excluding students served in dedicated special education centers

What they found

  • The estimated additional expenditure for the average student with a disability was $8,493 relative to a student without an identified disability.
  • Estimated additional expenditures ranged from $1,998 for a student identified with a specific learning disability to more than $23,000 for students in low-incidence and severe-disability categories.
  • Higher-income districts showed higher estimated spending for students identified with emotional impairments, Autism, and other health impairments.
  • The paper emphasizes that disability categories are broad, mutable labels and do not determine the exact services written into an individual student's IEP.

What the study does not prove

  • The analysis is descriptive and does not estimate causal costs or show that a disability label caused a district to spend a particular amount.
  • District spending does not reveal service quality, implementation fidelity, or student outcomes.
  • The study excluded students served in dedicated special education centers, districts with fewer than 500 students, and districts not offering education through high school.
  • Special education transportation expenditures were excluded, and Michigan's finance system may not generalize to other states.

Evidence strength: Large 13-year administrative panel with detailed district finance and disability-category data; descriptive model rather than a causal evaluation; working paper.

Why this matters for families

Ask beyond the category: What support is being delivered, how often, toward which goal, and what evidence shows that it is helping?

Noor interpretation

How Noor translates the evidence into practice

A disability category can shape systems and funding, but it cannot tell a family what instruction, accommodations, service minutes, or progress monitoring a particular learner actually receives.

Noor Lyra does not diagnose disabilities or replace an IEP team. Within its academic role, Noor can help families clarify the skill pattern beneath the label, review student work and progress evidence, and connect tutoring goals to the learning demands the student faces.

Read the original source

Noor links to the original or authoritative source so families can distinguish the evidence itself from our interpretation.

Open original source →

DOI: 10.26300/e372-gz08

Research notes

special educationIEPstudents with disabilitiesschool financeparent advocacy

No single study determines a student's plan. Noor uses research as one input alongside the learner's goals, observed performance, academic context, and response to instruction.