Frizzle
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100,000+ questions graded→

The operating system for every classroom

Students keep working on paper. Frizzle reads every page — math, essays, labs — and shows you who’s stuck, what’s spreading, and what each student needs next.

  • Free for individual teachers
  • No credit card
  • FERPA & COPPA compliant

Today on Frizzle

142,318

student responses read today — quizzes, labs, short answers and essays.

Proof

Real classrooms.
Real backing.

Live in over 30 schools and districts, from Greenwich to Arizona State — backed by Y Combinator and pledged with the White House.

Backer
“Teachers spend over 10 hours a week grading. Frizzle gives them that time back by instantly grading handwritten and typed math worksheets using AI.”
Y CombinatorLaunch announcement on X ↗
Live in class
Greenwich Public SchoolsDistrict partner
Investor
“The most promising part of Frizzle is the zero behavior change required on teacher’s part + the bottoms up adoption push from teachers who are discovering this product via social media!”
Rahul MathurPre-seed investor, DeVC · on LinkedIn ↗
Live in class
Hazelwood School DistrictDistrict partner
Investor
“Frizzle is an AI-powered solution for grading handwritten math worksheets. The platform helps teachers save 10-15 hours per week on grading while creating a faster feedback loop for students.”
DeVCPartnership post ↗
Live in class
Emery County School DistrictDistrict partner
Podcast
“Frizzle instantly grades handwritten math worksheets, and will generate a personalized lesson plan to address where students fell short so they can practice where they’re weak.”
Edtech InsidersAlex Sarlin & Ben Kornell · show notes ↗
Backer
“Teachers spend over 10 hours a week grading. Frizzle gives them that time back by instantly grading handwritten and typed math worksheets using AI.”
Y CombinatorLaunch announcement on X ↗
Live in class
Greenwich Public SchoolsDistrict partner
Investor
“The most promising part of Frizzle is the zero behavior change required on teacher’s part + the bottoms up adoption push from teachers who are discovering this product via social media!”
Rahul MathurPre-seed investor, DeVC · on LinkedIn ↗
Live in class
Hazelwood School DistrictDistrict partner
Investor
“Frizzle is an AI-powered solution for grading handwritten math worksheets. The platform helps teachers save 10-15 hours per week on grading while creating a faster feedback loop for students.”
DeVCPartnership post ↗
Live in class
Emery County School DistrictDistrict partner
Podcast
“Frizzle instantly grades handwritten math worksheets, and will generate a personalized lesson plan to address where students fell short so they can practice where they’re weak.”
Edtech InsidersAlex Sarlin & Ben Kornell · show notes ↗
Investor
“Frizzle is an AI-powered solution for grading handwritten math worksheets. The platform helps teachers save 10-15 hours per week on grading while creating a faster feedback loop for students.”
DeVCPartnership post ↗
Live in class
Meridian CUSD #223District partner
Podcast
“Frizzle instantly grades handwritten math worksheets, and will generate a personalized lesson plan to address where students fell short so they can practice where they’re weak.”
Edtech InsidersAlex Sarlin & Ben Kornell · show notes ↗
Live in class
Vanderbilt UniversityCollege math pilot
Backer
“Teachers spend over 10 hours a week grading. Frizzle gives them that time back by instantly grading handwritten and typed math worksheets using AI.”
Y CombinatorLaunch announcement on X ↗
Live in class
Arizona State UniversityCollege math pilot
Investor
“The most promising part of Frizzle is the zero behavior change required on teacher’s part + the bottoms up adoption push from teachers who are discovering this product via social media!”
Rahul MathurPre-seed investor, DeVC · on LinkedIn ↗
Investor
“Frizzle is an AI-powered solution for grading handwritten math worksheets. The platform helps teachers save 10-15 hours per week on grading while creating a faster feedback loop for students.”
DeVCPartnership post ↗
Live in class
Meridian CUSD #223District partner
Podcast
“Frizzle instantly grades handwritten math worksheets, and will generate a personalized lesson plan to address where students fell short so they can practice where they’re weak.”
Edtech InsidersAlex Sarlin & Ben Kornell · show notes ↗
Live in class
Vanderbilt UniversityCollege math pilot
Backer
“Teachers spend over 10 hours a week grading. Frizzle gives them that time back by instantly grading handwritten and typed math worksheets using AI.”
Y CombinatorLaunch announcement on X ↗
Live in class
Arizona State UniversityCollege math pilot
Investor
“The most promising part of Frizzle is the zero behavior change required on teacher’s part + the bottoms up adoption push from teachers who are discovering this product via social media!”
Rahul MathurPre-seed investor, DeVC · on LinkedIn ↗

What Frizzle sees

A red pen says wrong.
Frizzle says why.

Same student. Same page. Watch what each one actually tells you.

How Frizzle works

From a stack of paper to tomorrow’s lesson plan.

No tablets, no logins, no new workflow for students. Three steps, under ten minutes.

  1. 1

    Snap a stack

    Phone, doc cam or scanner. Every page lands on the right student.

    ~30s for a class
  2. 2

    Frizzle reads everything

    Every step, every subject — with each misconception named.

    ~8 min per class
  3. 3

    See the whole class

    Who’s stuck, what’s spreading, and what to teach tomorrow.

    Updated live

Every subject, one workflow

Math. Essays. Labs.
Frizzle reads them all.

Math

3(x + 2) = 21
3x + 6 = 21
3x = 15
x = 5

Every step checked, not just the answer.

ELA

Theme: memory gives Jonas feelings the others never had.

Strong claim — suggests a quote to back it up.

Science

2H₂ + O₂ → 2H₂O
4 H, 2 O each side
balanced!

Balanced, with the reasoning shown.

Social studies

The colonists were angry about the Stamp Act because they had no vote in Parliament.

Clear cause and effect — ready for a source.

For schools & districts

A live nervous system for every classroom.

Every stack you grade feeds one picture: median scores, proficiency, the weakest standard, and the takeaways to act on tomorrow — for one class, a school, or a whole district.

FRIZZLE · INSIGHTSAssignmentClassStudent
↧  Export PDFUnit 4 Quiz — Period 3 ⌄

ASSIGNMENT · GRADED OCT 14 Unit 4 Quiz · Period 3 24 submitted

Most of the class nailed rates and circles; nine students struggled with setting up equations from word problems and showed unclear reasoning, while the Pythagorean questions were solid.

MEDIAN SCORE78%Across 24 submissions
AT-OR-ABOVE PROFICIENT63%15 of 24 students
LOWEST-MASTERED COMMON CORE STANDARDHSA-CED.A.1Create equations and inequalities in one variable and use them to solve problems.

FRIZZLE · TOMORROW PLAN3 moves · ranked by impact

Tomorrow, here’s what changes — and the receipts.

1

Whole class · re-teach9 STUDENTS · Q1

Reteach: Setting Up Equations from Word Problems

Why → Nine students set up Q1 (HSA-CED.A.1) with unclear work. Model how to translate problem language into an equation step by step, then have pairs try a parallel problem.

▤  Build mini-lessonSee evidence →

2

Small group · pull4 STUDENTS · Q2

Small Group: Unit Rate Setup (Q2)

Why → Four students set up the complex-fraction rate incorrectly. A 5-minute check-in, then a parallel problem.

▤  Build practice setSee evidence →

3

Hand-back · sticky-note2 STUDENTS · Q4

Follow Up: Missing Submissions

Why → Two students didn’t submit Q4. Check whether they need it re-explained or just ran out of time.

QUESTION × STUDENT

Every cell links to the paper

Hover for a peek; click for full evidence. Toggle the color encoding below.

COLORStatusMistake typeConfidenceSORTNameScore Full creditPartial creditNo creditNo attempt
STUDENTQ1Q2Q3Q4SCORE
AMAlex M.92
APAva P.100
JKJaden K.42
MRMaya R.83
SPSara P.75
TCTheo C.88
Maya R. · Q1 · Partial creditSet up 18 × 42 but divided by the wrong total

QUESTION QUALITY

Did each question do its job?

Q1
Eighteen workers can build nine…HSA-CED.A.1

38% correct

100%AI CONF.
Q2
Jerry runs at 12 mph for the firs…7.RP.A.1

71% correct

99%AI CONF.
Q3
Tom flips a coin 4 times. What i…7.SP.C.8

92% correct

100%AI CONF.
Q4
The hypotenuse of a right trian…8.G.B.7

88% correct

100%AI CONF.

COMMON WRONG ANSWERS

The misconception, compressed.

Q1Q2

Eighteen workers can build nine houses in 42 days. How many houses can 28 workers complete in twelve days?

HSA-CED.A.1 · 9/24 WRONG

1
27MOST COMMON · 6 STUDENTS
See papers →
2
63 STUDENTS
See papers →

9 of 24 missed this. ✦ Build practice set

STANDARDS · COMMON CORE

Where the class stands, standard by standard

Common CoreConceptsWeakest firstStrongest

4 Common Core standards in play. Sorted by where the lever lives.

HSA-CED.A.1Create equations and inequalities in one varia…

38%AT RISKReteach →
7.RP.A.1Compute unit rates associated with ratios of f…

71%DEVELOPINGSmall group →
8.G.B.7Apply the Pythagorean Theorem to determine…

88%SECURE
7.SP.C.8Find probabilities of compound events using…

92%SECURE

EFFORT × ACCURACY

Not every low score means the same thing

A quadrant tells you the lever — skill, motivation, or fluency.

SCORE 100SCORE 0100% WORK SHOWN →
CoastingFluent and bored. Push.
MasteringEngaged. Consider extension.
DisengagedMotivation, not skill. Pull aside.
Engaged but stuckNeeds targeted help.
Jaden K. · 42% · 60% work shownEngaged but stuck — open the paper

WHAT THIS TELLS YOU

“Disengaged” isn’t a score — it’s a conversation.

Score is your y-axis. Effort (% of responses with sufficient work shown) is your x-axis. Bottom-left students need a 30-second pull-aside; top-right need an extension.

ENGAGED & STUCK · 4

JKSPLMNW

NEEDS A CHECK-IN

A two-second eye contact tomorrow.

JKJaden K.42% — well below the class median, worth a check-in.→

  • Standards alignment

    CCSS, NGSS, TEKS and 30+ state frameworks — every question is tagged to the standard it measures.

  • Equity dashboards

    Spot performance gaps the moment they emerge, for one class, a school, or a whole district.

  • Curriculum-agnostic

    Any worksheet, quiz, lab or essay prompt. No new materials, no behavior change.

Built for schools

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

Student work never trains our model. Data stays yours.

FERPA COPPA SOC 2 Type II
Federal compliant

Full FERPA & COPPA compliance. SOC 2 Type II audited annually, and we sign your district’s DPA.

Encrypted end-to-end

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

Your data, always

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

Questions, answered

The questions teachers ask first.

Still curious? Talk to a teacher on our team →
Do my students need an iPad or login?

No. Students keep working on paper exactly the way they always have. Frizzle reads the work after — from a phone snap, doc cam or scanner. Zero student accounts, zero device rollout.

Which subjects does Frizzle grade?

Math, ELA, science, social studies and full-length essays — plus any other subject you can write a rubric for. Pick the subject when you upload and Frizzle adapts how it reads and grades the work.

How accurate is the handwriting recognition?

97% on K–12 student handwriting in our last benchmark, including cursive, smudges and crossed-out work. When confidence is low, Frizzle surfaces the page for a one-tap human check instead of guessing.

Will it work with the curriculum we already use?

Yes. Frizzle is curriculum-agnostic — it reads any worksheet, problem set, quiz, lab report or essay prompt, and aligns to CCSS, NGSS, TEKS and 30+ state frameworks.

Is student data used to train your AI?

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.

How long does setup take?

For an individual teacher: under 5 minutes. Sign up with your 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.

What does it cost?

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.

Can it tell me WHY a student got something wrong?

That is the whole point. Frizzle tags named misconceptions in every subject, traces prerequisite gaps (when a 7th-grade error is really a 4th-grade gap), and shows the exact spot on the page where thinking went off.

Free for individual teachers, forever

See your first class before lunch tomorrow.

Sign up with your school email and snap a stack — any subject. Your first dashboard is ready in under 5 minutes. No setup calls, no IT.

  • No credit card
  • 5-min setup
  • FERPA & COPPA
  • Cancel anytime