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Your first 10 minutes on CS with ZAK

Choose your level, open a topic, learn it, test yourself and see your progress — the loop you will repeat for every topic.

Use the site in Arabic

Switch the menus, the home page, Learn, Tools, AskZ, tuition, help and the policies to Arabic, right to left. Study material stays in English, the language Cambridge examines in.

Take the site tour

A one-minute spotlight walk over the controls that are on every page: the menus, your level, search, Ask Z, your account and Help.

Choose or change your level

One setting decides what the whole site shows you first — O Level / IGCSE, AS, A2 or Full A Level.

Find anything with search (⌘K)

Search every page, topic, syllabus section, glossary term, example, video and past-paper set from one box.

Getting help on any page

Where help lives — always in the same places — and who to ask when a guide isn't enough.

A guide for parents

What your child can use here, how to see their progress, what is stored and how to reach a person.

Support the site and be shown as a sponsor

Support keeps everything here free. If you'd like, you can then be thanked by name — with your own words and logo — on the sponsors page, only with your consent.

Classes with ZAK

ZAK also teaches classes — in Karachi and live online — plus demo classes, crash courses and ZAKATHON in May. Joining is optional and never changes what is free here.

ZAK's books and ebooks

Read a free chapter, order a set or a book (black and white, colour or ebook) through the basket and our books desk on WhatsApp, then read the ebook on up to three devices.

ZAK's blog, YouTube and community

Where ZAK writes, teaches and answers outside the lessons: the blog, the YouTube channel, Discord and the study groups.

Follow your child's progress (parent view)

Your child invites you by email; you sign in with your own email and see a read-only summary — days studied, streak, scores by topic and class results.

Use a topic page and its study hub

Everything for one syllabus topic sits on its page — here is what each part does and the order to use it in.

Read, revise and download Smart Notes

Complete notes for every topic, a 60-second revision sheet, and PDF or PowerPoint downloads.

Find a video lecture

ZAK's whole YouTube channel, sorted by syllabus topic and by kind — lectures, past-paper solutions, revision.

Get the syllabus and full past papers

The official syllabus PDFs and specimen papers, and every past paper with its mark scheme, examiner report and grade thresholds.

Starting in 2027 or later? The 2029–2031 O Level / IGCSE course

Starting O Level / IGCSE in Sep 2027 or later? You sit the next syllabus. It has its own course here: 11 topics, Python only, with its own notes, quizzes, flashcards and assignments.

Read the Statometer — what to revise first

Every topic and syllabus bullet ranked by how often, and for how many marks, it really comes up.

Plan your exams and revision

Your zone's paper dates and Key Times, a countdown, a calendar file and a revision plan.

Plan your university applications

See which Computer Science degrees your A Levels keep open, work out your IBCC equivalence and put every admission date in your calendar.

Glossary, command words, pseudocode guide and infographics

The four reference pages: definitions in mark-scheme wording, what each exam verb wants, pseudocode beside Python, and downloadable diagrams.

Practise real past-paper questions by topic

Every Cambridge question for a topic, with the mark scheme and the examiner's comments — filtered, shuffled and saved.

Answer on the real paper and get it marked

Type, tick, draw and run code on the printed question, then have every part marked against the mark scheme.

Sit a timed paper

A fresh exam-length set of real questions against the clock, with results by topic, command word and AO.

Take a quiz

Auto-marked multiple-choice rounds for every topic — a new draw every time, with a weak-spots round.

Play Examiner's Traps

Fast true-or-false rounds of real mistakes from Cambridge examiner reports — 15 seconds a trap, with streaks and a score you can share.

Revise with flashcards

Shuffled decks for every syllabus section; the site remembers the cards you keep missing.

Do a ZAK Assignment

Three assignment sets per topic with model answers, self-marking and a PDF.

Solve an auto-marked programming task

Exam-style scenario tasks in pseudocode or Python, marked by hidden tests.

Learn Python step by step on a Python Path

Numbered Python steps for O Level / IGCSE or 9618 Paper 4, each checked automatically, with your place saved.

Follow your study route

Work through your whole syllabus in order, one section at a time: read, watch, a 5-question check, flashcards and past-paper questions.

Run pseudocode, Python, Java or VB.NET in the Playground

Write Cambridge pseudocode, Python, Java or VB.NET, run it with inputs, see a trace table, and get examiner-style error messages.

SQL, assembly, Prolog and the other code labs

Every code lab works the same way — Examples, Run, results, Ask Z — plus a few controls of its own.

Use the theory labs

Interactive labs for number systems, logic, data, networks, databases, compilers and systems — each with a practice mode.

Ask Z, the AI tutor

Ask anything about the syllabus or this site, send a photo or a paper, listen to answers, and keep your chats.

Ask and answer in the Discussion Corners

Post a question or join the chat with students taking the same papers — and bring AskZ into any thread with @AskZ.

Play the CS Games

Sixteen syllabus games — play solo against bots, online with friends, or join your class with a code.

Play OpcodeZ (9618 assembly missions)

Write real Cambridge 9618 assembly to solve memory puzzles, earn the size and speed medals, and answer "what is in ACC?" readouts.

Compare your week with others

See how your week compares with other students on your level — anonymously, and only once enough have joined.

XP, levels, streaks and your dashboard

How XP is earned, what the levels are, today's tasks and question, and where to see it all.

Sign in and sync your devices

Optional email sign-in — no password — so your XP, progress and paper work follow you to every device.

What is stored, and how to remove it

A plain-English map of what stays on your device, what goes to a server, and the switches you control.

Run a class corner

A private corner for your class: a join code, a Q&A board and chat, a shared study timer, quiz duels and full moderation.

Teachers: start here

What the site gives a Computer Science teacher, and how to use it with a class.

Request teacher access

The Paper Builder is for teachers. ZAK approves each request by hand.

A school licence for your department

What a school licence adds to the free teacher tier — the department's own AI allowance and colleagues' papers — and how a school gets one.

Build a paper and share it with your class

A class test, monthly test, mid-term or mock built to your topics, marks and time — shared as a link, handed out as a PDF.

Share a class link and see your class's results

One link per paper: post it to Google Classroom or WhatsApp, and the marks of signed-in students come back to you by question, topic, sub-topic and AO.

Keep class lists and set work for them

A standing list of your students — from a spreadsheet, a join code or Google Classroom — so the papers you set appear on their account page and you see who hasn't sent theirs.

Sit a paper your teacher sent

Opening a class link from your teacher, answering, and getting your marks.

Set a strict exam and mark it

A controlled, timed room for tests and exams: signed-in students only, one attempt, no mark scheme, no AskZ, no copy and paste. AskZ marks, you check and release.

Sit a strict exam

What happens in a strict exam your teacher set: one attempt, a clock that never stops, nothing else open — and what your teacher is told.

Join your teacher's class

Accept your teacher's invitation or type their join code, then find the papers they set under Set work.

Use it on a phone, or install it

Everything works in a phone browser; you can add it to your home screen today, and ZAPP is in beta.

Downloads and printing

Where every PDF, slide deck and image download is, and what to do when one won't save.

Something isn't working

Quick fixes for the problems people hit most often.

Keyboard shortcuts and accessibility

Every shortcut on the site, and the settings that make it easier to read and use.