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Your hardest modules, explained step by step the moment you get stuck. One AI tutor for maths, the sciences, engineering, economics and more.

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Calculus: Related Rates

Live AI Tutoring Session

45 mins remaining
Visual Canvas
y = x²

Eva is explaining

Understanding Related Rates

A quadratic equation is a polynomial equation of degree 2. The standard form is:

ax² + bx + c = 0
Progress
Teaches You, Never Cheats
Every Subject Covered
Trusted by Students Worldwide

✦ How it works

A real lesson, not a chat window

Your tutor leads the way: she explains first, shows you visually, then checks you actually understood.

Select subject

Calculus

Year 1

Organic Chemistry

Year 2

Statistics

Module

✦ Why students choose Classeva

Built for how you actually study

Flexible, judgement-free support that fits around your timetable and your budget.

01

Help at 2am before the deadline

Stuck on a problem set the night before it's due? Your tutor is awake 24/7 and fits around lectures, work and everything else.

02

Personalised to you

Classeva adapts to your pace, strengths and gaps, and explains things the way that actually clicks for you.

03

Know where you stand

Clear insights show which topics are solid and which ones to revise next, so exam season has no surprises.

04

Confidence, not just grades

Ask any question without judgement. Build genuine understanding well before the exam, not the night of.

Your progress

Know exactly where you stand

A private dashboard shows what you've learned, how long you studied, and precisely which topics to revise next.

15

Topics covered

12

Skills mastered

4.2h

Study time

87%

Accuracy rate

*Illustrative example of one week's report. Actual metrics vary with usage.

Full transparency

See every lesson and topic you cover.

Weekly updates

A clear report delivered to your inbox every week.

Actionable insights

Know exactly where to focus study time next.

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✦ Early feedback

What beta testers are saying

Early feedback from students testing Classeva.

I was completely lost in my signals module. Classeva broke it down step by step until it finally clicked. I went from dreading the exam to passing it comfortably.

Daniel R.

Beta Tester, 2nd-year Engineering

Having a tutor at 1am the night before a problem set is unreal. It walks me through the method instead of just handing me answers, so I actually learn it.

Aisha N.

Beta Tester, Economics undergraduate

For the price of a couple of coffees a month I get unlimited help across all my modules. It's the best study decision I've made at university.

Tom B.

Beta Tester, Biomedical Science

*Feedback collected from a small group of beta testers. Individual experiences may vary. These testimonials represent early impressions and are not guarantees of results.

✦ Questions, answered

Questions from students

Everything you need to know about Classeva.

Classeva teaches the subjects your modules are built on — maths, the sciences, economics, computer science, engineering and more. You tell it the topic you are studying and it teaches that topic at the level you need, rather than working from a fixed national syllabus. So while it is not tied to one university's exact module spec, it covers the underlying material your course is testing.

It is strongest across the quantitative and science subjects — mathematics, physics, chemistry, biology, computer science, engineering, economics and statistics — and can explain concepts, work examples and generate study material for them. For essay-based subjects it is useful for understanding ideas, structuring your thinking and testing your recall, but it will not write your assessed essays for you.

Classeva is built specifically to teach. It works examples step by step, checks whether you actually understood, generates flashcards and quizzes from your material, tracks what you keep getting wrong, and keeps the focus on you learning the method — not on handing you a finished answer to copy. It is a study environment, not a general chatbot.

Classeva is a tutor: it helps you understand topics and learn how to solve problems, the same way a human tutor or study group would. That is permitted at virtually every university. What is not allowed anywhere is submitting work you did not produce — so use Classeva to learn, and always follow your institution's academic-integrity rules for assessed work. It is deliberately built to teach you, not to complete your assignments.

Yes. Classeva is a personal monthly subscription with no lock-in — you can cancel from your account whenever you like and keep access until the end of the period you have paid for. There is no contract and no cancellation fee.

Yes — there is a free plan so you can try Classeva before paying anything, and it does not require a credit card to start. When you need more, you can upgrade to a paid plan.

Paid plans are a simple monthly subscription priced for a student budget, with a free plan to start and the option to save by paying annually. See the pricing page for the current plans and what each one includes.

No — that is the opposite of what it is for. Classeva walks you through the method so you can produce and understand the answer yourself. The goal is that you can do the next question without it, which is exactly what a closed-book exam tests.

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