100,000+ questions graded

The operating system for math classrooms

Students keep working on paper. Tosobe reads every page in real time - turning handwritten work into the granular data K-12 math has never had: who's stuck, which misconceptions are spreading, what each student needs next.

Free for individual teachers No credit card FERPA & COPPA compliant
Today on Tosobe
142,318
problems read
2,419
teachers
~8 min
avg. per class
📷 Snap a stack. Get a class.
Period 3 · Algebra I · Mr. Vega
Live
Maya R.
Unit 4 · Quiz · 10/14
1. Solve 3(x + 2) = 21
3x + 6 = 213x = 15x = 5 ✓
2. Solve 2x − 5 = 4x + 3
−5 − 3 = 4x − 2x−8 = 2xx = 4
3. Factor x² − 9
(x − 3)(x + 3)
Ms. Chen flagged 3 misconceptions before lunch.
How Tosobe works

From paper to insight in three steps

No new workflow for students. No tablets, no logins, no migration. Tosobe slots into the way teachers already teach.

01

Snap a stack

Phone, doc cam, or scanner. Tosobe reads handwritten work, ingests classroom photos, and links every page to the right student automatically.

⏱ ~30s for a class
02

Tosobe reads everything

Computer vision parses each step of student work - not just the final answer. It understands multiple solution paths and tags every misconception.

⏱ ~8 min per class
03

See the whole class

Live dashboards show who's stuck, which mistakes are spreading, and what to teach tomorrow - for one period or the whole district.

⏱ Updated live
What Tosobe sees

It's not grading. It's seeing.

Most tools mark answers. Tosobe understands thinking - every step, every approach, every misconception, in handwriting.

For teachers

Snap once. Read a class.

Stop spending Sunday on grading. Photograph a stack of papers and Tosobe reads every page in seconds - recognizing handwriting, multiple solution paths, and partial credit.

  • Reads any handwriting. Print, cursive, scribbled, sideways.
  • Understands multiple paths. Three ways to solve? Three students get credit.
  • Step-level feedback. Not "wrong" - but where the thinking went off.
3(x+2) = 21
3x + 6 = 21
3x = 15
x = 5
2x − 5 = 4x + 3
−8 = 2x
x = 4
Factor x²−9
(x−3)(x+3)
roots: 3, −3
21 / 28
papers read
3
flagged
Solve: 2x² − 8 = 0
Path A · Factoring
2(x² − 4) = 0 → x = ±2
✓ valid
Path B · Square root
x² = 4 → x = ±2
✓ valid
Path C · Quadratic formula
x = ±√(8/2) → x = ±2
✓ valid
Tosobe credits all three. Three students. Three brains. One answer.
The model

Trained on the way kids actually think.

Tosobe's model was built with 1.4 million pages of K-12 student work. It recognizes the messy, partial, beautiful ways real students arrive at answers - and surfaces what's underneath.

  • 147 named misconceptions across K-12 math, mapped to standards.
  • Prerequisite tracing. Knows when a 7th-grade error is really a 4th-grade gap.
  • Shows its work. Every flag links back to the exact stroke on the page.
For schools & districts

A live nervous system for math.

One classroom is a window. A whole school is a map. Tosobe aggregates anonymized signal across periods, grades, and buildings - so coaches and admins can see where to invest, what to reteach, and which curricula are actually working.

  • Standards alignment for CCSS, TEKS, and 30+ state frameworks.
  • Equity dashboards. Spot performance gaps the moment they emerge.
  • Curriculum-agnostic. Eureka, Illustrative, Saxon - Tosobe reads them all.
Mastered
68%
↑ 12 this week
Developing
24%
↑ 4
At risk
8%
⚠ 2 new
Engagement
94%
steady
Student
Mastery
Misconception
AM
Alex M.
94%
-
MR
Maya R.
71%
Sign errors
JK
Jaden K.
52%
Distributive
SP
Sara P.
88%
↑ improving
TC
Theo C.
91%
-
Built for schools

Privacy isn't a checkbox. It's the foundation.

Student work never trains our model. Data stays yours.

FERPA

Federal compliant

Full FERPA & COPPA compliance. SOC 2 Type II audited annually.

Encrypted

End-to-end

AES-256 at rest, TLS 1.3 in transit. Student PII never leaves your district.

Yours

Your data, always

One-click export, deletion on request. We don't train on student work. Ever.

Questions, answered

The questions teachers ask first

No. Students keep working on paper exactly the way they always have. Tosobe reads the work after - from a phone snap, doc cam, or scanner. Zero student accounts, zero device rollout.
97% on K–12 student handwriting in our last benchmark, including cursive, smudges, and crossed-out work. When confidence is low, Tosobe surfaces the page for a one-tap human check instead of guessing.
Yes. Tosobe is curriculum-agnostic - it reads any worksheet, problem set, or quiz. We have first-class support for Eureka, Illustrative Math, Saxon, Big Ideas, enVision, and 30+ state frameworks.
Never. Student work is encrypted, scoped to your district, and not used to train models. We are FERPA & COPPA compliant, SOC 2 Type II audited, and offer a signed DPA.
For an individual teacher: under 5 minutes. Sign up with school email, snap your first stack, and your dashboard is live. Districts get a dedicated rollout partner - most schools are running in under 2 weeks.
Free forever for individual teachers - no card, no trial expiry, no feature gates on grading. School and district plans add admin dashboards, SSO, rostering, and standards reporting; pricing scales by enrollment.
That is the whole point. Tosobe tags 147 named misconceptions across K–12 math, traces prerequisite gaps (when a 7th-grade error is really a 4th-grade gap), and shows the exact stroke on the page where thinking went off.
Still curious? Talk to a teacher on our team →
Free for individual teachers, forever

See your first class
before lunch tomorrow.

Sign up with your school email. Snap a stack of papers. Get your first dashboard in under 5 minutes - no setup calls, no procurement, no IT.

No credit card 5-min setup FERPA & COPPA Cancel anytime
Tosobe - AI-Powered Math Grading for Teachers