Concept Library
Every visual idea, ready to practice.
Search structured concepts across school subjects, careers, and real-world skills — then draw them in the Practice Studio.
31+ guided concepts
Learn it. Picture it. Draw it.
Each concept includes steps, key parts, career links, and a matching practice template.
Featured concepts
Letters Tracing
Practice uppercase and lowercase letters with guided tracing and writing rows.
Handwriting guide · Ages 4–7
Human heart
Draw and label the four chambers, valves, and major vessels.
Anatomy diagram · Ages 13–16
Water cycle
Map evaporation, condensation, precipitation, and collection.
Flow diagram · Ages 8–12
Airplane wing
Cross-section showing lift, airflow, and wing shape.
3D + diagram · Ages 13–16
H₂O molecule
Bent water molecule with bond angle and lone pairs.
Formula guide · Ages 13–16
Business model canvas
Nine blocks: customers, value, channels, revenue, and more.
Flow diagram · Ages 17+
Prompt thinking flow
Goal → context → constraints → clear prompt → check output.
Flow diagram · Ages 13–16
Beginner-friendly
Letters Tracing
Practice uppercase and lowercase letters with guided tracing and writing rows.
Handwriting guide · Ages 4–7
Numbers Tracing
Practice number forms 0-9 with guided tracing and counting.
Handwriting guide · Ages 4–7
Flower structure
Label petals, stamen, pistil, and stem on a typical flower.
3D + diagram · Ages 8–12
Atom structure
Nucleus, protons, neutrons, and electron shells.
Formula guide · Ages 13–16
H₂O molecule
Bent water molecule with bond angle and lone pairs.
Formula guide · Ages 13–16
Geometric solids
Cube, cylinder, sphere, and cone with edges and faces.
3D + diagram · Ages 8–12
Career-based concepts
Letters Tracing
Practice uppercase and lowercase letters with guided tracing and writing rows.
Handwriting guide · Ages 4–7
Numbers Tracing
Practice number forms 0-9 with guided tracing and counting.
Handwriting guide · Ages 4–7
Human heart
Draw and label the four chambers, valves, and major vessels.
Anatomy diagram · Ages 13–16
Brain structure
Map major regions: cerebrum, cerebellum, brain stem.
Anatomy diagram · Ages 17+
Flower structure
Label petals, stamen, pistil, and stem on a typical flower.
3D + diagram · Ages 8–12
Water cycle
Map evaporation, condensation, precipitation, and collection.
Flow diagram · Ages 8–12
Practical skills
Solar panel system
Panel, charge controller, battery, and inverter layout.
System diagram · Ages 17+
Phone charging circuit
From USB power to battery: adapter, port, and path.
System diagram · Ages 17+
Motorbike engine basics
Four-stroke cycle: intake, compression, power, exhaust.
System diagram · Ages 17+
Plumbing water flow
Tank to tap: inlet, pipes, valves, and drain.
Flow diagram · Ages 17+
Agriculture irrigation system
Water source, pipes, drip lines, and crop rows.
System diagram · Ages 17+
Carpentry measurement plan
Shelf plan with length, width, and cut marks to scale.
System diagram · Ages 17+
All concepts
Showing 31 of 31
Letters Tracing
Practice uppercase and lowercase letters with guided tracing and writing rows.
Handwriting guide · Ages 4–7
Numbers Tracing
Practice number forms 0-9 with guided tracing and counting.
Handwriting guide · Ages 4–7
Human heart
Draw and label the four chambers, valves, and major vessels.
Anatomy diagram · Ages 13–16
Brain structure
Map major regions: cerebrum, cerebellum, brain stem.
Anatomy diagram · Ages 17+
Flower structure
Label petals, stamen, pistil, and stem on a typical flower.
3D + diagram · Ages 8–12
Water cycle
Map evaporation, condensation, precipitation, and collection.
Flow diagram · Ages 8–12
Electric circuit
Build a simple loop: battery, wire, bulb or resistor.
Flow diagram · Ages 13–16
Airplane wing
Cross-section showing lift, airflow, and wing shape.
3D + diagram · Ages 13–16
Atom structure
Nucleus, protons, neutrons, and electron shells.
Formula guide · Ages 13–16
H₂O molecule
Bent water molecule with bond angle and lone pairs.
Formula guide · Ages 13–16
Benzene structure
Hexagonal ring with alternating bonds or circle for delocalization.
Formula guide · Ages 17+
Photosynthesis flow
Inputs and outputs: CO₂, light, water → glucose and O₂.
Flow diagram · Ages 13–16
Krebs (citric acid) cycle overview
Circular pathway: acetyl-CoA in, CO₂ and energy carriers out.
Flow diagram · Ages 17+
Geometric solids
Cube, cylinder, sphere, and cone with edges and faces.
3D + diagram · Ages 8–12
Bridge structure
Forces on beams, pillars, and deck in a simple bridge.
System diagram · Ages 17+
Solar panel system
Panel, charge controller, battery, and inverter layout.
System diagram · Ages 17+
Robot arm
Joints, links, gripper, and rotation axes.
System diagram · Ages 17+
Dress pattern
Flat pattern pieces: bodice, skirt, seam allowances.
3D + diagram · Ages 13–16
Fashion mannequin proportions
Nine-head croquis figure for sketching garments.
3D + diagram · Ages 13–16
Phone charging circuit
From USB power to battery: adapter, port, and path.
System diagram · Ages 17+
Motorbike engine basics
Four-stroke cycle: intake, compression, power, exhaust.
System diagram · Ages 17+
Plumbing water flow
Tank to tap: inlet, pipes, valves, and drain.
Flow diagram · Ages 17+
Business model canvas
Nine blocks: customers, value, channels, revenue, and more.
Flow diagram · Ages 17+
Customer journey map
Stages from awareness to purchase with touchpoints.
Flow diagram · Ages 17+
Prompt thinking flow
Goal → context → constraints → clear prompt → check output.
Flow diagram · Ages 13–16
First aid response flow
Check, call for help, safe response steps.
Flow diagram · Ages 17+
Profit and loss flow
Revenue minus costs equals profit (or loss).
Flow diagram · Ages 17+
Agriculture irrigation system
Water source, pipes, drip lines, and crop rows.
System diagram · Ages 17+
Carpentry measurement plan
Shelf plan with length, width, and cut marks to scale.
System diagram · Ages 17+
Human lungs
Trachea, bronchi, lobes, and diaphragm connection.
Anatomy diagram · Ages 13–16
Eye structure
Cross-section: cornea, lens, retina, optic nerve.
Anatomy diagram · Ages 17+