SUMMER 2025 RESULTS
A Summer of Growth for Students and Teachers
Guided by NSSI’s expert mentors, 3,000 teachers and 565 school leaders sharpened their instructional skills and helped their students achieve meaningful academic gains.
With its 27 partners in 13 states and Washington, DC, NSSI’s program supported 65,000 students over the summer 0f 2025.
Math Gains
%
Avg. % Point Gain Per Grade
NSSI offers a clear, concise and engaging curriculum that is also very user friendly – especially for the short window of time given for summer school. The math program integrates both foundational skills and problem solving – preparing students for the next grade level.
– NYCPS School Leader
On a 100-point scale, the average class score in K-8 Math (including HS-level classes) increased by 16 percentage points from pre- to post-assessment. All grades showed improvement, with average gains ranging from 10 points to 34 points.
ELA Gains
%
Avg. % Point Gain Per Grade
The novel was very good. The students were engaged. I learned strategies that I will use in the classroom for the upcoming school year.
– Erik, 3rd Grade Teacher
On a 100-point scale, the average class score in 3-8 ELA increased by 12 percentage points from pre- to post-assessment. All grades showed improvement, with average gains ranging from seven points to 18 points.
Note: Most districts chose not to assess children in K-2 ELA classrooms due to time and technology constraints.
Teacher Satisfaction
NSSI offers a comprehensive curriculum. The topics covered and the books assigned help students stay engaged. There are opportunities to teach the curriculum, to build prior knowledge, and to plan the lesson in order to allow all students to learn at all entry points.
– Jessica, Kindergarten Teacher
I appreciated not having to create everything from scratch, yet still being able to adapt lessons. The mentor teachers modeled lessons, offered feedback, and made professional development feel immediately useful.
– Jaleesa, 3rd Grade Teacher
Excellent training, excellent support, excellent availability, excellent materials. There was nothing I had to find or gather together, everything was so well organized.
– Stephanie, 6th Grade Math Teacher
School Leader Satisfaction
NSSI’s curriculum just makes sense. It’s easy to teach and their PDs are expertly led. They also improve and refine the curriculum every year.
– Jake, School Leader
I keep coming back! NSSI has struck the balance between rigor and joy in their curriculum and pacing. I have seen significant growth in my own scholars… giving them the boost they need to be successful in the following school year.
– Stephanie, School Leader
NSSI provided invaluable supports for me as a leader not only during the summer, but also for years to come.
– Linda, School Leader