Sketchpad
Draw the diagram or the problem, then ask the tutor about it.
What the Sketchpad does
Shapes, arrows, text and freehand. Sketch the diagram the question describes, then send it into a chat and ask what it means.
A small drawing program for the diagram the question describes: freehand, straight and curved lines, rectangles, ellipses, arrows and text, each with a stroke or a fill. Draw the circuit, the force diagram, the number line or the shape, then send it into a chat and ask about it.
It is for the questions that cannot be typed. A geometry problem you can only half remember, a graph you sketched in class, a diagram your teacher drew that you need explained.
More tools
A calculator, a grapher, a triangle solver, an equation balancer and a Python console. All of them run in your browser, all of them are free, and none of them need an account.
- Worksheet graderPhotograph a finished worksheet and get it graded, line by line.
- Essay graderGraded against a real rubric, or reviewed with no score at all.
- Citation generatorAPA, MLA, Chicago and Harvard, with the in-text bracket included.
- Word counterWords, characters, sentences and reading time, live as you type.
- Grammar checkerEvery error listed with the fix and the rule behind it, no rewrite.
- Answer checkerShow your working and find out exactly where it went wrong.
- CalculatorA real scientific calculator with a tape of everything you typed.
- Graphing calculatorPlot any function, drag the view around, and read off the roots.
- Triangle solverSet the sides or the angles and watch it draw the triangle for you.
- Equation balancerBalance any reaction and get molar masses from the periodic table.
- FlashcardsPaste your notes and study them as flashcards, right this minute.
- Quiz makerTurn your notes into a marked practice test you can take right now.
More about the Sketchpad
Everything you draw is kept as shapes, so Undo is real and the picture redraws crisply at any size. Send to chat flattens it to an image and attaches it to your message, and the answer refers to what you drew.
It also lives inside the dashboard chat, where a sketch can be attached to any message mid-conversation.
Why ours is better
Shapes, not pixels.
Because the drawing is a list of shapes, you can undo, move things and redraw cleanly, and the version the chat sees is sharp.
It ends in a question.
A drawing tool that only draws is a distraction. This one exists to get a diagram in front of a tutor that can read it.
Nothing is stored.
Drawings live in your browser until you send one. Sending attaches it to that one message and nothing else.
How it was built
It began as a way to attach a sketch to a chat message and grew into a small illustrator when it turned out that most diagrams need an arrow, a label and a straight line, not freehand alone.
It loads on demand and runs on your device. The image it produces goes to a model measured on reading degraded phone photos, so a rough sketch is read as well as a printed page.
Keep what you work on
A free account keeps your questions together by class, remembers what you have covered, and gives you a weekly allowance rather than a daily one.