Nonclassroom-based (NCB) charter high schools in California show chronic absenteeism rates roughly 10 percentage points higher than traditional public schools, according to peer-reviewed research by Rose, Reed, and McCaskill (2026) in the Journal of School Choice analyzing statewide attendance data across charter sectors. The gap widens further in high-poverty NCB charter upper schools, which is exactly the slice of the sector that serves students traditional schools could not reach: medically fragile students, students with anxiety-based school avoidance, students in rural geographies, student-athletes, students pulled out mid-year after a bullying incident, and families who chose independent study on purpose. The attendance gap is not a story about whether NCB charters are "working." It is a story about what engagement looks like when a student does not physically walk through a door every day, and what intervention programs serving these schools need to understand about the leading indicators underneath the attendance number.
The peer-reviewed analysis, built on California Department of Education attendance files, compared chronic absenteeism (missing 10% or more of enrolled school days) across charter school types. Classroom-based charter schools tracked close to traditional district schools. NCB charters, a category that includes independent-study programs, homeschool support charters, and hybrid models, ran roughly 10 percentage points higher. In high-poverty NCB upper schools (grades 9-12), the gap stretched further. The researchers were careful to note that the finding is not a judgment on NCB charter quality. It is a structural observation: when attendance is defined by seat-time logs, and seat-time is replaced by work-sample verification and learning period certification under California Education Code Section 51747, you get a different-looking attendance number by design.
EdSource's coverage of California's chronic absenteeism trend confirms the system-wide pressure: California's statewide chronic absenteeism rate sat at 20.4% in 2023-24 per CDE DataQuest, still well above the pre-pandemic 12%. The NCB sector sits on top of that elevated baseline.
If you run a nonclassroom-based charter, an independent-study program, or a homeschool support charter, the attendance gap shows up in three places that matter to your authorizer and your funding:
In our experience working with NCB and homeschool support charter partners across California, the coordinators who manage this best are the ones who stop treating attendance as a standalone metric and start treating it as a lagging indicator of a deeper question: is the academic work landing with the student?
When a student does not walk into a classroom, the behavioral signals teachers normally read, eye contact, body language, side conversations with peers, whether a backpack got unpacked, disappear. What replaces them is work-sample quality, cadence of submissions, log-in patterns, and the presence or absence of a scheduled weekly adult touchpoint outside the family.
Research on high-impact tutoring, synthesized by Stanford's National Student Support Accelerator and the Annenberg Institute at Brown University, consistently finds that the mechanism driving outcomes is not simply instructional content. It is the recurring relationship with a consistent adult, delivered at a cadence of three or more sessions per week, embedded in the school day where possible. Accelerate's field reporting on tutoring at scale describes similar patterns: dosage and relationship consistency are the levers coordinators can pull hardest on.
For an NCB student, that recurring adult touchpoint is often the only non-family, non-authorizing-teacher adult the student sees in a given week. In our experience, the weekly session becomes the engagement anchor that classroom-based peers get by default through their teachers, coaches, and specialists. We think of it as the "second adult" touchpoint: neither family, nor the authorizing teacher of record, but a consistent weekly relationship the student shows up for.
A+ Tutoring, a California K-12 virtual intervention provider that works almost exclusively with charter and homeschool-support LEAs, has published Tier 3 outcomes from the 2024-25 iLEAD Online Exploration cohort that speak to this directly. Across the combined Tier 3 cohort, 80% of students (16 of 20) reached MAP Growth benchmarks at 3-6x national rates, with 75% in Math Tier 3 (9 of 12) and 87.5% in ELA Tier 3 (7 of 8). The full case studies are published at Math Tier 3 and ELA Tier 3.
The structural piece behind those outcomes is worth naming. A+ sessions are scheduled commitments: Teachworks calendar entries with parent-signed session caps, tutor-of-record continuity across the term, and a weekly cadence that does not shift with the family's travel schedule. When a student misses, the tutor flags it inside 48 hours and the coordinator on the school side gets a log. From where we sit, that scaffolding is doing engagement work independent of the content being taught. We are not claiming A+ raises a school's chronic absenteeism rate off the Dashboard. We are saying the mechanics of a scheduled 1:1 relationship give an NCB student the "show up for someone" weekly anchor that classroom-based peers get by default.
A+'s program design was awarded the NSSA Tutoring Program Design Badge by the National Student Support Accelerator at Stanford University (2024-2026 term), signifying the quality of our program design and our alignment to Tutoring Quality Standards, as assessed by researchers and practitioners.
Reflection question for coordinators reading this: When your Dashboard chronic absenteeism indicator came back last cycle, did you look at it alongside your MAP Growth data by the same subgroup, or were they reviewed separately by different staff?
Five concrete steps, usable whether or not you ever talk to A+:
A+ Tutoring is a California K-12 virtual intervention provider working with charter LEAs, independent-study programs, and homeschool support charters on Tier 2 and Tier 3 academic intervention. Our 2024-25 iLEAD Tier 3 outcomes: 75% of Math Tier 3 students, 87.5% of ELA Tier 3 students, and 80% of the combined Tier 3 cohort reached MAP Growth benchmarks at 3-6x national rates. Our program design holds the NSSA Tutoring Program Design Badge from the National Student Support Accelerator at Stanford University (2024-2026).
Walk Your NCB Attendance Data With Danielle