St. Mary Immaculate Parish School

What St. Mary Immaculate Parish School does

St. Mary Immaculate Parish School is a private Catholic PK-8 school located at 15629 S. Route 59 in Plainfield, Illinois, operating under the Diocese of Joliet as a parish ministry of St. Mary Immaculate Parish. Founded in September 1955 with an initial cohort of 167 students and four religious sisters, the school has run continuously for 70 years — surviving the August 1990 F5 tornado that destroyed the campus, killing the principal and two others, and reopening in fall 1993 after a full reconstruction. It serves 371 students across preschool (age 3) through 8th grade with an average class size of 17, and is staffed by an accredited teaching corps under Principal Jennifer Errthum with policy oversight from a School Board led by President Mike Baumgartner.

The school's core academic product is a single integrated PK-8 program structured into Early Childhood (PS/PK/K), Lower Elementary (1-3), Upper Elementary (4-5), and Junior High (6-8), supplemented by a state-of-the-art STEM lab, 1:1 Chromebooks in grades 5-8, and enrichment specials (music, band, Spanish, PE, art, Genius Hour). Extracurriculars include athletics (grades 5-8), drama club, church choir, and faith formation activities anchored by daily religion classes and weekly Mass. The technology stack is intentionally minimal: FACTS/RenWeb serves as the integrated SIS and tuition management platform, with no proprietary software, no public APIs, and no AI/ML capabilities. The school is dually accredited by the State of Illinois and the Joliet Diocese.

Revenue is generated almost entirely through tuition, billed monthly via FACTS with rates of approximately $6,010-$6,460 per year for the first child depending on program (PS-K full day vs. K-8), discounted for multi-child families, with parishioner status conferring a $2,000 discount. Ancillary revenue streams include a $125 per-child technology fee, $200 per-family registration fee, a hot lunch and milk program, and an extended day before/after-school care program. The go-to-market motion is direct-to-consumer: families inquire via the RenWeb inquiry form, call admissions directly (Hope at 815-436-3953), or schedule visits, with the annual registration cycle opening during Catholic Schools Week in late January. Demand generation leans on parish communications, virtual tours, and consistent Best of Will County / Herald-News Readers Choice recognition across preschool, elementary, and non-profit fundraising categories since 2017.

Name

St. Mary Immaculate Parish School

Legal name

St. Mary Immaculate Parish School

Website

https://smischool.org

Company type

Private

Founded year

1955

Operating status

Operating

Headcount range

1–10 employees

Short description

St. Mary Immaculate Parish School is a private Catholic PK-8 school in Plainfield, Illinois, serving 371 students with tuition-based enrollment, daily faith formation, a STEM lab, and 1:1 Chromebooks in junior high.

Ownership category

akta.pro rank

Product category

Private Catholic K-8 Education

NAICS

Elementary and Secondary Schools (6111), Elementary and Secondary Schools (61111), Educational Services (61)

SIC

Services-Educational Services (8200), Services-Child Day Care Services (8351)

akta.pro primary industry

Faith-Based (Religious) K–12 Schools (EDAJABAC)

akta.pro secondary industries

Faith-Based Preschools (EDACABAF), Faith-Based Early Learning Academies (EDACADAH)

Keywords

• Catholic elementary education
• K-8 faith-based education
• Private preschool programs
• Academic excellence programs
• Catholic school education

Headquarters

HQ city

Plainfield

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Supply Chain

Revenue model

1. Tuition - Preschool through Kindergarten: Annual tuition paid monthly through FACTS management system. Rates vary by number of children in family. Parishioner rates apply to registered St. Mary Immaculate Parish members; non-parishioner rates are $2,000 higher. Full-day and half-day options available for PS/PK.
2. Tuition - 1st through 8th Grade: Annual tuition with monthly payment options (payments 2-10 through FACTS). First payment due May 15th. Multi-child discounts available. $75 discount for full annual payment.
3. Technology Fee: $125 per child technology fee. Chromebook purchase required for grades 5-8.
4. Registration Fee: $200 per family registration fee.
5. Hot Lunch and Milk Program: Hot lunch and milk available at additional cost to parents.
6. Extended Day Program: Before/after school care available at additional fee, used on an as-needed basis.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

St. Mary Immaculate Parish School delivers Catholic faith-integrated private education for students from Preschool (age 3) through Grade 8, organized into Early Childhood (Preschool, Pre-K, Kindergarten), Lower Elementary (Grades 1-3), Upper Elementary (Grades 4-5), and Junior High (Grades 6-8). The core service is daily academic instruction in literacy, mathematics, science, and social studies, complemented by religion classes, weekly Catholic Mass, STEM lab instruction, music, art, PE, Spanish, and 1:1 Chromebooks for grades 5-8, with tuition-based enrollment and ancillary services including extended-day care, hot lunch, athletics, band, choir, and drama.

Product overview

St. Mary Immaculate Parish School is a Catholic educational institution offering a comprehensive PK-8 program (Preschool age 3 through Grade 8) as a single unified educational offering. The school operates as one integrated academic program with distinct grade-level divisions (Early Childhood: Preschool, Pre-K, Kindergarten; Lower Elementary: Grades 1-3; Upper Elementary: Grades 4-5; Junior High: Grades 6-8). Core academic programs are enhanced by STEM Lab, Music, Art, PE, Spanish, and Band as enrichment specials, while extracurricular activities include Drama Club, Choir, Athletics, Chess Club, and Academic Competitions. The school utilizes FACTS (RenWeb) as its integrated education management platform for grades and parent communication.

Differentiator

Problem solved

Functional benefit

Products and services

• Preschool Program (Age 3) Full and half-day preschool for three-year-olds introducing classroom routines and foundational concepts through hands-on exploration in literacy, numeracy, science, and the arts with intentional social-emotional development.
• Pre-Kindergarten Program (Age 4) Faith-centered Pre-K program with full and half-day options providing structured instruction in early literacy and numeracy while building independence, with exposure to Art, Music, and gym.
• Kindergarten Program Full-day, five-day Kindergarten bridging early childhood with elementary expectations through balanced curriculum in literacy, math, science, and social studies with strong social-emotional and spiritual formation.
• Lower Elementary (Grades 1-3) Strong early elementary foundation where faith, academics, and character development grow together through structured instruction, including sacramental preparation for Second Grade students.
• Upper Elementary (Grades 4-5) Upper elementary preparing students for junior high through collaborative learning, differentiated instruction, and Catholic formation, including the 1:1 Chromebook program starting in Grade 5.
• Junior High (Grades 6-8) Rigorous curriculum developing analytical thinking with faith formation, Confirmation preparation, and leadership opportunities; features 1:1 Chromebook program and high-school-level Algebra I available for 8th graders.
• STEM Program State-of-the-art STEM lab enhancing rigorous curriculum at all grade levels through hands-on projects and digital tools, integrating Catholic values with science, technology, engineering, and math education.
• Band Program School band welcoming students in grades 4-8 to develop musical talents while serving the faith-filled community through performances at school Masses, concerts, and special events.
• Church Choir Children's Choir open to students in grades 6-8 providing opportunity to enrich school liturgies and lead worship at Mass while building confidence, collaboration, and faith.
• Drama Club Annual musical production inviting all 4th through 8th graders to audition; previous productions include 'Mary Poppins Jr.', 'Joseph and the Amazing Technicolor Dreamcoat', and 'Elf Jr.'; next production is The Addams Family Jr. (May 7-9, 2026).
• Athletics Program Competitive sports program for boys and girls beginning in 5th grade, including Cross-Country, Basketball (5th-8th grade), Track & Field (7th-8th grade), and Volleyball (7th-8th grade).
• Extended Day Program After-school Extended Day program available at additional cost for families needing childcare, providing supervision and activities when regular school hours end.
• Faith Formation Program Daily prayers, weekly Catholic Mass, grade-level retreats, and faith-infused classroom lessons forming an integral part of school experience, cultivating Catholic faith and moral foundation.

Quantifiable outcome

• 371 students enrolled for 2025-2026 with average class size of 17
• +1 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature3 records

Scale indicators5 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Cathedral of St. Raymond School: Catholic K-8 school in Joliet, IL under the Diocese of Joliet, located at the Mother Church of the diocese. Directly comparable as a same-diocese urban Catholic elementary school with parish-integrated operations and similar tuition tiers.
• St. Jude the Apostle Catholic School: Catholic K-8 school in New Lenox, IL under the Diocese of Joliet serving the same Will County market as SMI. Directly comparable on faith-based curriculum, parent-paid tuition structure, and student-athlete extracurricular offerings.
• All Saints Catholic Academy: Catholic K-8 school in Joliet, IL under the Diocese of Joliet serving Will County families. Comparable on faith formation, academics, and tuition-funded operating model within the same diocesan system.
• Holy Trinity Catholic School: Catholic PK-8 school in Shorewood, IL under the Diocese of Joliet serving Plainfield-area suburbs. Directly comparable as a same-diocese Catholic K-8 competitor with similar tuition model, faith formation programming, and small-class-size positioning.

Broad incumbents

• Diocese of Joliet Catholic Schools: The diocesan governing body that oversees St. Mary Immaculate Parish School and operates the broader network of Catholic schools across seven Illinois counties. Directly comparable as the umbrella organization setting curriculum standards, accreditation, and policy direction for SMI and its peer schools.
• Cristo Rey Network: National network of 40+ Catholic schools serving primarily low-income families with a distinctive corporate work-study funding model. Comparable as a Catholic school operating model at scale, though SMI uses traditional tuition rather than the work-study revenue approach.
• Seton Education Partners: National Catholic school operator running classical academy schools and revitalizing urban Catholic schools across the U.S. Comparable as an institutional operator of Catholic K-8 schools with a focus on faith formation and academic rigor.

Regional players

• Archdiocese of Chicago Catholic Schools: The Catholic school system of the adjacent Archdiocese of Chicago, which operates a large network of K-8 parish schools across Chicago and northern Cook/western suburbs. Comparable as a neighboring diocesan system serving a similar demographic of Catholic families in the Chicago metropolitan area.
• Avery Coonley School: Independent private K-8 school in Downers Grove, IL serving Chicago's western suburbs. Comparable as a non-faith-based private elementary school competitor in the broader Chicago metro area, though it lacks SMI's Catholic formation component.

Others

• Joliet Catholic Academy: Diocese of Joliet-affiliated high school (grades 9-12) in Joliet, IL that serves as the primary secondary destination for SMI's 8th-grade graduates. Comparable as the downstream feeder institution within the same diocesan Catholic education pipeline.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/school/st-mary-immaculate-parish-school

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about St. Mary Immaculate Parish School