Twelve exam programs. Nothing to plan.

AP and IGCSE, taught live by your tutor, one lesson after another. 693 topics, every lesson already written and checked.

See a real lesson

How deep?

Every topic taught once, with worked examples and practice questions.

Humanities 1
Human GeographyAP25 h

AP Calculus AB

39classes

of 45 minutes · 29.2 hours
8 units · 81 topics

Start this program

Free to start. No pass needed.

Syllabus and exam details

Hours of lessons, every offer drawn to the same scale. Three IGCSE programs come as a Core and an Extended offer.

Every lesson is written once, then checked before it’s kept.

This is a real beat from AP Calculus AB. Drag h toward zero: the secant becomes the tangent.

  • Written onceA lesson is a short card: teach it, show it, check it.
  • CheckedA second pass solves every multiple-choice question again and audits the working.
  • Taught liveYour tutor teaches it by voice, a step at a time, and answers what you ask.

How a class runs

AP Calculus AB, Unit 1 Example slide

Averages use more than one input

An interval containing a chosen instant uses values from multiple inputs. When available, inputs on both sides help compare the interval’s secant slope with the tangent slope.

01020304050607001234timepositionsecant slope 12.64tangent slope 12

Secant slope 12.64Tangent slope 12

Drag h toward zero to see the secant across [2−h,2+h] approach the tangent at x=2.

Compare average velocities around a time

A moving object’s position is s(t)=t³ meters. Compare average velocities on intervals surrounding t=2.

  1. 1
    Choose a wide intervalThe interval [1,3] surrounds time 2, using one input before and one after it.
  2. 2
    Find its averages(1)=1 and s(3)=27, so (27−1)/(3−1)=13 meters per second across the interval.
  3. 3
    Narrow the intervals(1.5)=3.375 and s(2.5)=15.625, so the average is (15.625−3.375)/1=12.25 meters per second.
  4. 4
    Narrow it agains(1.9)=6.859 and s(2.1)=9.261, giving (9.261−6.859)/0.2=12.01 meters per second.
  5. 5
    Interpret the patternThe averages move toward a value near 12, but each still summarizes its own interval, not every instant within it.

Interpret an interval’s average velocity

For s(t)=t³ meters, the average velocity on [1,3] is 13 meters per second. Which conclusion is justified by that average alone?

  • AThe object’s velocity is 13 meters per second at every instant from 1 to 3.
  • BThe object’s instantaneous velocity at time 2 is 13 meters per second.
  • CThe object’s position at time 2 is 13 meters.
  • DNet position change divided by elapsed time is 13 meters per second; the average alone gives no specific instant’s velocity.

Miss a class? Nothing is dropped.

Each class teaches the next lessons nobody has had yet. Skip one, and its lessons move to the next class.

AP Calculus AB Standard · the first classes
Class 1

Introducing Calculus: Can Change Occur at an Instant?

Defining Limits and Using Limit Notation

Estimating Limit Values from Graphs

Class 2

Estimating Limit Values from Tables

Determining Limits Using Algebraic Properties of Limits

Class 3

Determining Limits Using Algebraic Manipulation

Selecting Procedures for Determining Limits

Class 4

Determining Limits Using the Squeeze Theorem

Connecting Multiple Representations of Limits

Exploring Types of Discontinuities

Nothing skipped. Class 1 starts with the first lesson.
  • Homework after each classOn what was just taught, ready when the class ends.
  • Two mock papersSat as long homework at the Full syllabus level. Set by your tutor before the exam.
  • Past papersAnswer whole past papers on the page and get them marked.

A parent’s view, without sitting in.

For parents

  • A letter after classWhat was covered, and why the next class is what it is.
  • Listen to a live classOpen it and listen, including your child’s microphone. Your child’s screen says “A parent is listening”.
  • Quiet, or closely informedA recap and a weekly note, or reminders too, and a note if your child hasn’t joined five minutes in.

Start free. Buy a program only if you want it all.

Any program starts on your plan’s live minutes. A program pass holds one program’s class hours, at one level, for one learner. No subscription.

Class hours at your own pace · 12 months to use them · 15% extra time · A refund of unused hours within 14 days

Compare the plansSign-in required to buy

AP Calculus AB

Program pass

Short5 hours$29
Standard29.2 hours$149
In depth45 hours$229
Extended60.8 hours$309
Full syllabus64.5 hours$329
Every program, every level
Program pass price and hours for every program and level
ProgramShortStandardIn depthExtendedFull syllabus
Mathematics
AP Calculus AB $295 h $14929.2 h $22945 h $30960.8 h $32964.5 h
AP Calculus BC $295 h $19939.8 h $30960.8 h $40981.2 h $43986.2 h
AP Precalculus $295 h $13926.2 h $19938.8 h $24949.5 h $26952 h
AP Statistics $295 h $12925.5 h $19938.2 h $25950.5 h $26953.2 h
IGCSE Additional Mathematics $294.8 h $5911 h $8917.5 h $11922.8 h $12924.2 h
IGCSE Mathematics (Core) $294.5 h $8917.2 h $12924.8 h $16933.8 h $18936.8 h
IGCSE Mathematics (Extended) $295 h $10921.2 h $15931.2 h $20941.8 h $22944.8 h
Sciences
AP Biology $295 h $11923.8 h $17935 h $22945 h $24948 h
AP Chemistry $295 h $15930.8 h $24948.8 h $30960.5 h $32965 h
IGCSE Biology (Core) $295 h $12924.2 h $18936 h $24948.2 h $26952.2 h
IGCSE Biology (Extended) $295 h $12924.5 h $18936.2 h $24948.8 h $26952.8 h
IGCSE Chemistry $294 h $5911.2 h $8917.8 h $11923.5 h $12925 h
IGCSE Physics (Core) $193.8 h $9918 h $13927 h $17934.5 h $18936.5 h
IGCSE Physics (Extended) $193.8 h $9918.2 h $13927.5 h $17935 h $18937 h
Humanities
AP Human Geography $295 h $12925 h $18937.2 h $23946 h $24949.2 h
  • Mathematics
  • AP Calculus AB29.2 hours$149
  • AP Calculus BC39.8 hours$199
  • AP Precalculus26.2 hours$139
  • AP Statistics25.5 hours$129
  • IGCSE Additional Mathematics11 hours$59
  • IGCSE Mathematics (Core)17.2 hours$89
  • IGCSE Mathematics (Extended)21.2 hours$109
  • Sciences
  • AP Biology23.8 hours$119
  • AP Chemistry30.8 hours$159
  • IGCSE Biology (Core)24.2 hours$129
  • IGCSE Biology (Extended)24.5 hours$129
  • IGCSE Chemistry11.2 hours$59
  • IGCSE Physics (Core)18 hours$99
  • IGCSE Physics (Extended)18.2 hours$99
  • Humanities
  • AP Human Geography25 hours$129

What people ask first.

Is this a course, or a class?

Both. A program is a syllabus cut into classes. Every class is live with your tutor, and the next one starts where the last one stopped.

Do I have to buy a pass?

No. Any program starts on your plan’s live minutes, and Free gives you enough for one class at the default length. A pass is for one program, at one level, for one learner, if you want a set number of class hours with no subscription.

Is the tutor a person?

No. It’s an AI that speaks with your child live, and its recaps are written by AI too, so what it says can occasionally be wrong. The lessons themselves are written once, ahead of time, and checked.

What if we miss a class?

Its lessons move to the next class, so nothing is skipped. If a class is missed, up to three make-up times for the next week are suggested.

Does it follow my exam board’s syllabus?

Each program is built from the board’s published syllabus and written in our own words. It is not made, approved or endorsed by the board. Where a program doesn’t yet cover a whole syllabus, its page says so.

How soon can we start?

Right away. A program class starts the moment you press Start now, with no slides to wait for. You can book classes ahead too.

How old does my child need to be?

13 or older. If your child is under 18, a parent or guardian needs to agree to the terms.

Pick an exam. Your first class is free.

Start free See plans

No card needed.

AP® is a trademark registered by the College Board, which is not affiliated with, and does not endorse, this site. Cambridge IGCSE® and Cambridge International AS & A Level are trademarks of Cambridge University Press & Assessment, which is not affiliated with, and does not endorse, this site.