Discover / Theory of Pi
Understand an idea, try it yourself, and find help when you get stuck.
Walk through bite-size immersive lessons that bring ideas to life with visuals and examples.
Explore lessons and simulations →The engine pushes forwards with 4,000 N. Friction and air resistance push back with 1,000 N.
Explore interactive simulations, test your ideas, and see the theory in motion for yourself.
Add a component, drag it into place, then join the terminals to build your circuit. Select a component to change its value.
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What to study and when to review, planned in your calendar so you can focus on the learning. Adjust your plans as your schedule changes.
See how study plans work →Keep exploringSee how a parabola moves right, then up.
An example week. Your own plan follows your course and exam date.
Available features depend on the course, lesson, question and subscription. These previews show a small part of the experience.
A conversation that starts where you are stuck and changes as you explain what you need.
Ask about the lesson or question you are working on. Get deep explanations and hints, and take the next step fearlessly.
Explore the AI Tutor guide →The car has a driving force. Why isn’t it accelerating?
Compare the driving force with the resistance. If they balance, the resultant force is zero.
So a force can be acting without changing its speed?
Yes. Acceleration depends on the resultant force, not just one of the forces.
Your tutor can explain visually through plots and diagrams that help you connect ideas.
I can use F = ma, but what does it look like?
Let’s plot acceleration against resultant force for a 2 kg cart. Double the force and you double the acceleration.
The tutor can find you lessons, problems and other resources on this platform right when you need them to build your understanding.
Keep exploringI don’t understand how to combine sine and cosine. Can you find the lesson?
Answer checks, marks and advice help you improve. Get guidance on common mistakes, showing your working and presenting clear exam answers.
Submit your answer to check its value, units, rounding and required form. Feedback on common mistakes explains how to correct them.
Explore grading and feedback →The value matters, but so does the form the question asks for.
AI grading assesses your submitted response against the question’s criteria. See which points earned credit and what is missing to compute the final score.
Share your steps and the tutor will point out where your reasoning went off track. Get practical exam guidance on showing your method, using the right units and avoiding common mistakes. Advice does not change your recorded mark or submit an answer for you.
Keep exploringA 1,200 kg car has a driving force of 4,000 N and resistance of 1,000 N. Find its acceleration.
The example plays automatically. Watch how one small correction changes the answer.
One of the best tests of understanding is whether you can build the problem yourself.
Use Question Studio to invent your own Maths and Physics problems, solve them, and get feedback on whether they work. Creating a problem makes you deeply examine concepts and assumptions.
Keep exploringUse s = ut + ½at² to connect acceleration, time and distance.
Research on mathematical problem posing reports benefits for achievement and problem-solving skills. Read the meta-analysis ↗
A look at what we’re working towards. These additions are not available yet.
Four new courses are planned next, with all four targeted for release by January 31, 2027.
The order and target date reflect our current plan and may change.
Pi Harmony is a live AI tutor you can talk to as you study. It works with the full lesson content, including simulations and visuals, and shares a whiteboard where you and the tutor can both write and draw.
Keep exploringYour plan says graph transformations need attention today. I’ve opened a short lesson to begin.
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