Co-TeacherGet the app
Co-Teacher

Close the gaps before your next lesson.

Co-Teacher analyzes handwritten work in any subject and builds targeted feedback, practice, and reteach lessons that fit your day.

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★★★★★
“What I love most is it doesn't just give answers... My daughter can independently check her work without cheating, and she's genuinely learning in the process.”
Parent
4TH GRADE
Works with Google Classroom
SCAN OR IMPORT WORK
Learning Commons
Standards by Learning Commons
ALIGNED TO YOUR STATE
Any subject, any language
FOR EVERY CLASSROOM
HOW IT WORKS
01

Scan handwritten work.
See how they did.

From your phone, a class iPad or Google Classroom.

Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
Maya
P = 6+6+4+4
= 20 cm
4
6
Jordan
A = 8 × 3
= 24 cm²
3
8
Priya
P = 8+8+3
= 19 cm
3
8
Devon
P = 2(5+4)
= 18 cm
4
5
Sofia
P = 8+8+3+3
= 22 cm
3
8
A = 8×3 = 24
STUDENT%Q1Q2
Q3
■Maya R.
67
✓
✓
✗
●Jordan K.
33
✓
✗
✗
▲Priya S.
100
✓
✓
✓
●Devon M.
67
✓
✓
✗
■Sofia L.
67
✓
✓
✗
CLASS63867431
ACCURACY BY QUESTION5 QUESTIONS
Q2
Q1
Q3
Q4
Q5
0%75%100%
02

Discover class-wide
trends in minutes.

Spend less time checking work and searching for gaps
and more time closing them.

03

Share targeted feedback &
practice the same day.

Print each student's unique worksheet for homework or tomorrow's warm-up.

Maya R.GR 4
Perimeter of L-shapes
STRENGTHS
You found the area correctly and labeled each side.
PRACTICE
1
Find the perimeter of the L-shape.
2
Count the units around the border.
Jordan T.GR 4
Multiplying fractions
STRENGTHS
Great job simplifying before you multiplied.
PRACTICE
1
Multiply 2/3 × 3/4 and simplify.
2
Explain why the product is smaller.
Aiden P.GR 4
Main idea & detail
STRENGTHS
You matched each detail to the right paragraph.
PRACTICE
1
Write the main idea in one sentence.
2
List two details that support it.
SQUARES
CIRCLES
TRIANGLES
RETEACH · CIRCLES1 / 4
Perimeter of polygons
04

Pull a small group
as your time allows.

Groups sorted by shared misconception, highest-leverage first. Lesson slides included.

Designed for teachers, parents and schools.

Fits the school day

Use for homework, first 10 minutes of class tomorrow or small group time. No disruption to your curriculum.

Less screentime. More thinking.

Analyzes handwritten work across subject areas. Small group lessons encourage student talk and discussion.

Easy to start

No installs on school systems or integrations required. No student accounts.

Your data, always

FERPA-aligned, with a DPA on request. Limited PII. Export or delete anytime. Never used to train AI.

20 years in K–12 and technology.

Ian Bravo
Ian Bravo
CO-FOUNDER · INSTRUCTION

Teacher and founding instructional leader. NYC DOE, TFA, KIPP NYC, Fisher Fellow, KIPP NJ and Miami. 3 years designing and launching mixed-income microschools in Florida and Arizona.

Samir Rayani
Samir Rayani
CO-FOUNDER · TECHNOLOGY

Engineer and CTO. Co-founded Next Big Sound in 2008 and led engineering until Pandora acquired the company in 2015. Seven years as a guest lecturer at NYU Steinhardt.

Frequently Asked Questions

Can I scan multi-page assignments?

Yes. Scan every page of a packet or essay and Co-Teacher keeps each student's work together.

What can I scan?

Handwritten or typed work across subjects: math, ELA, science, short responses, essays, multiple choice, exit tickets.

Are there other ways to scan than my phone?

Yes. Use an iPhone, iPad, or Android, or have students scan their own work at a class iPad station. Email a PDF and Google Classroom integration are coming this fall.

ALL QUESTIONS →