Long notes are boring. Brain-hack the whole H446 specification with active recall and actually remember it.
OCR A-Level Computer Science H446
OCR A-Level Computer Science (specification H446) is sat as two written papers and a programming project. Component 01 is computer systems: the processor, software, data exchange, networks, data representation and the legal and ethical issues. Component 02 is algorithms and programming, including computational thinking and the standard algorithms. The programming project is a problem chosen by the teacher or learner, marked by the centre and moderated by OCR.
Cambridge OCR Level 3 Advanced GCE in Computer Science, specification H446, version 3.0. Read the OCR specification ↗
Component 01
2 hours 30 minutes140 marks40%
Component 02
2 hours 30 minutes140 marks40%
Component 03 or 04 (80 if carried forward)
Non-exam assessment70 marks20%
16 topics, 116 subtopics. Open any topic to see what is inside it.
Pick the mode that fits the time you have.
No account needed. Answer from memory first.
How reviews are timed
Levo will automatically distribute all of your progress into a spaced repetition calendar. Once you’ve answered, it’s scheduled for you on the next day in the spaced repetition schedule. Over time, the gaps between your recall get bigger, from a day to three years, reinforcing memorisation over a long period of time.
Interval sequence
Six ways to work the same material
Common questions about revising OCR A-Level Computer Science. Tap any to open it.
By testing yourself, not rereading. Active recall, pulling each answer from memory then checking it, builds far stronger memory than highlighting notes. Levo runs the method for you across all 16 Computer Science topics and brings each one back on a spaced schedule so it stays memorised.
Skip the long notes and go straight to retrieval. Levo turns the H446 specification into short questions you drill with rapid recall, cram whole papers in one sitting, and a readiness score tells you exactly what is left to learn.
There are 16 topics, split across 116 subtopics, from Processors: Structure, Performance and Types, Input, Output and Storage, Systems Software and more. Every topic is listed above, and each one opens to the subtopics inside it.
Six ways to work the same material. The 3-step method for learning a set, Cram for sorting a whole paper into what you know and what you do not, Blank Blitz for making key facts automatic, Build It for assembling full-mark answers, Test It for catching misconceptions, and Brain Breaks between sessions. A readiness score tracks how much of the subject you have memorised.
Consistently, yes. Rereading feels productive but fades quickly. Retrieving an answer from memory, the way Levo tests you, is what actually forms durable memory, and it shows you honestly what you do and do not know.
Every topic on the H446 specification is covered, written from the published subject content. The full list is above, and each topic opens to its subtopics so you can see exactly what is there before you subscribe.
Make it short, structured and low-pressure. Levo gives a clear daily plan, quick sessions rather than marathon ones, streaks that reward showing up, and an honest readiness score, so revision feels like progress instead of a chore. Parents can add an account and follow along.
Yes. Cram mode is built for exactly that: fly through a whole paper, sort every topic into red, amber and green, then drill just the reds and ambers you do not know yet. It is the honest version of a last-minute session.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
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