The National Summer School Initiative (nssi)

What The National Summer School Initiative (nssi) does

The National Summer School Initiative (NSSI) is a 501(c)(3) nonprofit, founded in 2020 in Brooklyn, NY, that provides turnkey K-8 summer learning programs to U.S. school districts and charter management organizations. Its core offering bundles a fully scripted, standards-aligned ELA and Math curriculum with structured professional development (Teacher Institute, Leader Institute, and ongoing weekly virtual PD), a mentor teacher network of named practitioners selected for fast student learning gains, and implementation support covering operational logistics, technology platform setup, and coaching. Curriculum is delivered through a digital Curriculum Hub (curriculum-hub.nssi.org) and a dedicated NYCPS Curriculum Hub variant, with differentiated student workbooks, teacher PowerPoint decks, and embedded mentor teacher video segments designed to remove teacher planning time. NSSI reports serving roughly 65,000-70,000 students across 27 partner districts in 13 states and DC in 2025, with 3,000 teachers and 565 school leaders participating, and cites average class score gains of 16 percentage points in Math and 12 percentage points in ELA on a 100-point scale.

NSSI's revenue model combines district partnership fees (per-student pricing benchmarked at $120 per student, $2,400 per classroom, billed via multi-year contracts) with philanthropic contributions that subsidize affordability. The go-to-market is sales-led, with CEO Nancy Livingston personally conducting exploratory calls with superintendents and district cabinet members, supplemented by an active content marketing funnel (LinkedIn Live, EdWeb webinars, an insights blog, 'The Sizzle' newsletter, and downloadable guides such as 'A Practical Guide for School District Leaders'). Customers include a mix of large public school districts (NYCPS, Charlotte-Mecklenburg, Oakland Unified, Everett Public Schools) and charter networks (KIPP DC, Alliance College-Ready Public Schools, Crescent City Schools, Gem Prep, Fortune School). Technology integrations are conventional: Zoom for Education, G Suite, and Google Classroom, with an external AI-assisted feedback integration through Snorkl rather than any proprietary AI infrastructure.

Name

The National Summer School Initiative (nssi)

Legal name

National Summer School Initiative, Inc.

Website

https://nssi.org

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

11–50 employees

Short description

NSSI is a 501(c)(3) nonprofit providing turnkey K-8 summer curriculum, professional development, and mentor teacher support to U.S. school districts and charter networks, serving roughly 65,000-70,000 students across 27 districts in 13 states and DC.

Ownership category

akta.pro rank

Product category

K-12 Education Services

NAICS

Educational Support Services (611710), Educational Support Services (61171), Elementary and Secondary Schools (6111)

SIC

Services-Educational Services (8200)

akta.pro primary industry

Accelerated Learning & Grade Advancement Programs (EDAJAGAE)

akta.pro secondary industries

After-School Academic Support Programs (Centers & Clubs) (EDAJALAM), Online Credit Recovery & Alternative Pathways (Virtual) (EDAJADAF)

Keywords

• K-12 summer learning
• Educational curriculum
• Teacher professional development
• Summer school programs
• ELA and math curricula

Headquarters

HQ city

Brooklyn

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. District Partnership Fees: NSSI charges districts for access to its curriculum, professional development, and implementation support. The organization reinvests all revenue into curriculum development, teacher training, coaching, and expanding access to partner districts. As a nonprofit, NSSI operates at low cost to partner districts.
2. Philanthropic Funding: NSSI is a registered 501(c)(3) nonprofit (EIN: 87-1464717) that raises philanthropic funds to subsidize district partnerships and maintain affordable pricing. Donations are tax-deductible and support the organization's mission to provide high-quality summer programming.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

NSSI partners with K-12 public school districts and charter management organizations to deliver standards-aligned summer learning programs. Its core offerings include ELA and math curricula, multi-tier professional development for teachers and school leaders, a Mentor Teacher Program, and ongoing operational support, all delivered through flexible in-person, hybrid, or virtual models. The program currently reaches approximately 65,000-70,000 students across 27 districts in 13 states and Washington, D.C.

Product overview

NSSI is a nonprofit offering a unified turnkey summer learning platform for K-8 that combines curriculum products (ELA and Math), professional development modules (Teacher Institute, Leader Institute, Ongoing PD), mentor teacher support, operational guidance, and a digital Curriculum Hub. The core product is the summer program itself, which districts implement using NSSI's curriculum and training. Supporting products include the NYCPS-specific Curriculum Hub, Teacher PowerPoints, Student Workbooks, and Mentor Teacher Videos. AI-assisted feedback is referenced as a partner-enabled feature through integration with Snorkl.

Differentiator

Problem solved

Functional benefit

Products and services

• NSSI Summer Learning Program
• ELA Curriculum
• Math Curriculum
• Professional Development (Teacher Institute, Leader Institute, Ongoing PD)
• Mentor Teacher Program
• Operational Support
• Curriculum Hub

Quantifiable outcome

• Math gains of 16 percentage points on average (100-point scale) with gains ranging 10-34 points across grades
• +5 more outcomes

Named customers10 records

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature5 records

Partnerships

Three partnerships are on record, tiered minor.

• StandardsWorkminorStrategic or Co-development PartnerKristen McQuillan, Chief Program Officer at StandardsWork and facilitator of the Knowledge Matters Campaign, co-hosted a LinkedIn Live with NSSI on novel-based instruction and knowledge building for reading comprehension.
• 50CANminorStrategic or Co-development PartnerLiz Cohen, VP of Policy at 50CAN and author of The Future of Tutoring, joined NSSI's LinkedIn Live discussion on summer school vs. tutoring research, exploring how districts can design coherent systems for student learning.
• Open LiteracyminorStrategic or Co-development PartnerDr. Sarah Scott Frank, CEO of Open Literacy, participated in NSSI's CALDER research discussion on summer school effectiveness, focusing on reading outcomes and instructional design.

Scale indicators9 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Curriculum Associates: Large K-12 curriculum and assessment company (iReady) that provides differentiated ELA/math instruction and PD at scale to districts nationwide. A broader incumbent that increasingly competes for summer and intervention budgets alongside NSSI.
• DreamBox Learning: Adaptive K-8 math platform used by districts for intervention and acceleration; relevant to NSSI's math curriculum and PD layer. NSSI board president previously led corporate development at DreamBox, signaling direct competitive adjacency.
• Voyager Sopris Learning: Provider of K-12 literacy, math, and professional development solutions for district intervention and summer programs. Comparable offering to NSSI's ELA/math curriculum + teacher PD, with a much wider scope spanning school year and summer.
• Imagine Learning: Major K-12 supplemental curriculum and intervention provider covering ELA, math, and credit recovery with district-level PD. Comparable on the curriculum + PD bundle to K-8 districts, though as a much larger commercial vendor.

Direct peers

• HopSkipDrive / Summer Advantage USA (SAUSA): Nonprofit focused on summer learning loss prevention for elementary students through program partnerships with schools and districts. Direct peer in summer academic intervention and the same target customer (district/school leaders).
• BellXcel: National nonprofit that partners with schools and districts to design and implement K-8 summer and afterschool programs with a focus on social-emotional and academic outcomes. Direct peer in the summer-program-as-turnkey-service category.
• BELL (Building Educated Leaders for Life): National nonprofit providing K-8 summer and school-year academic programs with embedded teacher professional development to close opportunity gaps. Closest direct peer to NSSI - same summer-learning, district-partnership, evidence-driven nonprofit model.

Regional players

• Horizons for Youth: Nonprofit running summer learning programs for K-8 students in partner school districts. Highly comparable mission and student outcomes focus, though primarily concentrated in the Northeast rather than the 13-state footprint NSSI serves.

Emerging players

• Teaching Matters: Nonprofit that delivers teacher professional development and instructional coaching to urban districts. Comparable in the embedded PD + coaching model that NSSI wraps around its summer curriculum, though not summer-specific.
• KIPP Foundation: National charter network that has used NSSI for summer ELA programming (KIPP DC). Comparable in summer learning design and teacher practice focus, but as a school operator rather than an external vendor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/the-nssi

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 The National Summer School Initiative (nssi)