What is the Evidence-Based Funding (EBF) model?

State funding formulas calculate an 'adequacy target' for each district based on student needs (poverty, English learners, special education) and compare it to available local resources. Districts furthest from their target receive the most new state funding.

What does the funding gap mean?

The funding gap is the difference between what a district needs (its adequacy target) and what it currently receives from all sources. A district at 90% of its adequacy target has a 10% funding gap. States aim to bring all districts to at least 90% adequacy over time.

How are EBF tiers determined?

Districts are grouped into four tiers based on their percentage of adequacy: Tier 1 (below 70%), Tier 2 (70-90%), Tier 3 (90-100%), and Tier 4 (above 100%). New state funding flows primarily to Tier 1 and Tier 2 districts to close the biggest gaps first.

Green Oaks, IL School Funding Gaps & Adequacy

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School Funding — FY2026i

NCES

State funding formulas determine whether your school districts have enough money. Here's where they stand.

How School Funding Works

State funding formulas calculate an Adequacy Target for each district, the estimated cost to provide an adequate education. Districts are then compared against that target.

Districts are assigned to Tiers 1-4 based on their percentage of adequacy. Tier 1 districts (most underfunded) receive the largest share of new state funding.

Tier 1: Below 60% of adequacy

Tier 2: 60% to below 90% of adequacy

Tier 3: 90% to below 100% of adequacy

Tier 4: At or above 100% of adequacy

Source: State Education Funding Data

Avg % of Adequacyi

151.1%

Funding vs. Needi

Libertyville Comm H SCH Dist 128165.63%

$84.8M funded$51.2M target

Libertyville School Dist 70124.57%

$36.5M funded$29.3M target

Lake Forest Comm H S District 115193.26%

$41.0M funded$21.2M target

Oak Grove School Dist 68131.73%

$16.8M funded$12.8M target

Lake Bluff Elem School Dist 65141.3%

$17.2M funded$12.2M target

Rondout School Dist 722.55%

$5.5M funded$2.1M target

District Detail

Libertyville Comm H SCH Dist 128Tier 4

165.63% funded

At or above 100% of adequacy — fully funded

The state estimates it costs $51.2M to adequately educate all students in this district. The district currently has $84.8M in resources — that's 165.63% of what it needs. This district meets or exceeds its funding target.

What it needsi

$51.2M

What it hasi

$84.8M

From the statei

$2.1M

This district is better funded than 99% of districts statewide.

Libertyville School Dist 70Tier 4

124.57% funded

At or above 100% of adequacy — fully funded

The state estimates it costs $29.3M to adequately educate all students in this district. The district currently has $36.5M in resources — that's 124.57% of what it needs. This district meets or exceeds its funding target.

What it needsi

$29.3M

What it hasi

$36.5M

From the statei

$1.8M

This district is better funded than 92% of districts statewide.

Lake Forest Comm H S District 115Tier 4

193.26% funded

At or above 100% of adequacy — fully funded

The state estimates it costs $21.2M to adequately educate all students in this district. The district currently has $41.0M in resources — that's 193.26% of what it needs. This district meets or exceeds its funding target.

What it needsi

$21.2M

What it hasi

$41.0M

From the statei

$884K

This district is better funded than 100% of districts statewide.

Oak Grove School Dist 68Tier 4

131.73% funded

At or above 100% of adequacy — fully funded

The state estimates it costs $12.8M to adequately educate all students in this district. The district currently has $16.8M in resources — that's 131.73% of what it needs. This district meets or exceeds its funding target.

What it needsi

$12.8M

What it hasi

$16.8M

From the statei

$437K

This district is better funded than 94% of districts statewide.

Lake Bluff Elem School Dist 65Tier 4

141.3% funded

At or above 100% of adequacy — fully funded

The state estimates it costs $12.2M to adequately educate all students in this district. The district currently has $17.2M in resources — that's 141.3% of what it needs. This district meets or exceeds its funding target.

What it needsi

$12.2M

What it hasi

$17.2M

From the statei

$566K

This district is better funded than 95% of districts statewide.

Rondout School Dist 72Tier 1

2.55% funded

Below 60% of adequacy — receives the largest share of new state funding

The state estimates it costs $2.1M to adequately educate all students in this district. The district currently has $5.5M in resources — that's 2.55% of what it needs. This district meets or exceeds its funding target.

What it needsi

$2.1M

What it hasi

$5.5M

From the statei

$104K

This district is better funded than 1% of districts statewide.

Statewide Tier Distributioni

Tier 1: 36 (yours)

Tier 2: 579

Tier 3: 96

Tier 4: 221 (yours)

Green Oaks, IL School Funding Gaps & Adequacy