PAPRGrid · From rough source to editable document

Turn rough STEM work into polished documents.

PAPRGrid transforms worksheets, handwriting, equations, tables, and diagrams into structured, editable content you can review, refine, save, reopen, and export.

PNG · JPG / JPEG · PDF · .papr file-only or file + prompt

See how it works

What we’re building

Four planned chapters for a teacher-led workflow. These interface previews show the product direction while early access is still in development.

1Step 1 of 4

Capture your material

Open a .papr project, or bring in PNG, JPG/JPEG, or PDF source material—including scans or handwriting—with an optional prompt to guide the result.

New teaching document

Drop material here

PNG, JPG/JPEG, PDF, or .papr

Choose sourceAdd prompt

4 sources received

Phone photo
PDF worksheet
Scanned page
Handwritten notes
2Step 2 of 4

Structure the content

The planned workflow will organize headings, questions, equations, diagrams, tables, and teaching blocks while keeping the source visible beside the result.

Detecting worksheet structure

Practical physics · Energy

Pendulum investigation: energy transfers

Question 3

A 0.40 kg pendulum is released from a height of 0.28 m. Determine its speed at the lowest point.

Energy model

mgh = ½mv²

v = √(2gh) = 2.34 m s⁻¹

h = 0.28 mvL = 0.75 m
TrialHeight / mTime / sSpeed / m s⁻¹
010.200.641.98
020.240.692.17
030.280.752.34
Heading
Question
Equation
Diagram
Table
Structure concept preview
3Step 3 of 4

Verify and refine

We’re designing review steps for formulas, scientific labels, and warnings, with teachers making every final decision.

Review reaction scheme

Stoichiometry check

2H₂ + O₂ → 2H₂O

Atoms and coefficients are balanced

Energy profile label

Activation energy Eₐ

Arrow endpoint confirmed at transition state

EₐReactantsProductsΔH < 0
Teacher review concept
4Step 4 of 4

Edit and export

The product direction includes editable blocks and practical classroom formats. Export capabilities are not part of tonight’s public early access.

Circle theorem lesson pack

Geometry · Theorem 4

Angles subtended by an arc

Concept

Worked proof

Show that ∠AOC = 2∠ABC for points A, B and C on the circle.

ACBO
1. OA = OB = OC (radii)
2. Base angles in each isosceles triangle are equal.
3. Therefore α + β = 2x.
Teacher note · reveal Step 3 after discussion

Independent check

Apply the theorem to arc AC when ∠ABC = 38°.

Answer

76°

Export lesson pack

12 pages · diagrams embedded

×
PDFPrint ready
DOCXEditable
PNGImage
SVGFigures
.paprSave + reopen
PPTXComing soon

Designed around real
teaching work

Lesson preparation

Notes become a clear handout

We’re exploring a teacher-led path from rough lesson planning to a clearer resource that can be reviewed and refined.

Product concept Source-led Teacher controlled
MON 09:10

lesson: quadratic transformations

y = (x − 2)² − 3

vertex (2, −3), axis x = 2

vertex right 2, down 3

• compare with y = x²

• ask pupils to predict roots first

misconception: signs inside bracket!

Quadratic transformations · Handout

Year 10 mathematics · Lesson handout

Transforming quadratic graphs

Read vertex form, sketch the transformation, then verify intercepts.

y = (x − h)² + k → vertex (h, k)

(2, −3)
1. Translate right by 2.
2. Translate down by 3.
Check: substitute x = 0.
Try: sketch y = −2(x + 1)² + 44 marks

Worksheet rebuilding

Questions stay editable

The product direction keeps source material visible while educators shape editable questions, equations, and diagrams.

Product concept Source-led Teacher controlled

DC circuits · Rebuilt worksheet

Physics · Electricity

Series and parallel circuits

Concept

Question 6 · Network analysis

A 12 V supply powers R₁ = 4 Ω and R₂ = 6 Ω in parallel, with R₃ = 2 Ω in series. Find the total current and each branch current.

R₃ = 2 ΩR₁ = 4 ΩR₂ = 6 Ω12 V

Equation set

1/Rₚ = 1/4 + 1/6

Rₜ = Rₚ + 2

Iₜ = V/Rₜ

Known

V = 12 V

R₁, R₂, R₃

Find

Iₜ, I₁, I₂

include units

Working

Rₚ = 2.4 Ω

Iₜ = 2.73 A

Scientific communication

Rough diagrams become precise

We’re designing visual tools for clearer labels and relationships, with every part kept available for teacher review.

Product concept Source-led Teacher controlled

Synaptic transmission figure

Biology · Neurophysiology

Chemical synaptic transmission

Synaptic vesiclesNeurotransmitterLigand-gated receptor1 · Action potentialSynaptic cleftPostsynaptic membrane
1. Vesicle release2. Diffusion3. Receptor binding
Interface concept

Review stays honest

Uncertainty is never
hidden.

PAPRGrid keeps the original beside the edited version. If a formula, label, or region needs attention, Review shows it instead of quietly guessing.

Original document section
v = u + at

“Confirm the final character in the equation.”

Review stateTruthful by design
VerifiedChecked content can move forward.Checked
Needs reviewUncertain content stays visible beside the original.Review
UnresolvedResolve this item before exporting.Review

Designed with STEM in mind

Early-access interface concepts for proofs, investigations, worked solutions, and scientific figures—shown to invite educator feedback.

Geometry

Cyclic quadrilateral proof

Concept
ABCDα180° − α

Proof structure

Opposite angles in a cyclic quadrilateral sum to 180°.

1.∠BAD subtends arc BCD
2.∠BCD subtends arc BAD
3.∠BAD + ∠BCD = 180°
Reason attached to each step

Physics

Standing-wave harmonics

Concept

Standing waves · first three harmonics

L = 0.80 m
n=1n=2n=3
λ₁ = 2Lf₂ = 2f₁v = fλ

Calculus

Definite integral and area

Concept
ab∫ f(x) dx

∫₁³ (x³ − 3x² + 4) dx

F(x) = ¼x⁴ − x³ + 4xArea = 6 units²

Chemistry

Esterification mechanism

Concept

CH₃COOH

Ethanoic acid

+

CH₃CH₂OH

Ethanol

CH₃COOCH₂CH₃

Ethyl ethanoate

fruity ester
conc. H₂SO₄ · heatprotonationnucleophilic attackeliminate H₂O
Reversible reactionRemove water to increase yield

Statistics

Regression and interpretation

Concept
revision time / minassessment score / %

Correlation

r = 0.87

Strong positive association. Correlation does not prove causation.

Model

ŷ = 0.31x + 48.2

Biology

Nephron filtration pathway

Concept
Loop of HenleDistal tubuleCollecting ductProximal tubuleGlomerulus
1Ultrafiltration2Selective reabsorption3Water balance4Urine formation

Your source. Still your meaning.

Help shape what
comes next.

Join educators helping shape a practical path from rough STEM material to editable, reviewable documents.

SourceReviewStudioEdit + export