Mini-lessons › GCSE › Computer Science › OCR

OCR GCSE Computer Science · spec J277 · 12 mini-lessons

OCR GCSE Computer Science
12 free mini-lessons, in order.

One interactive lesson for every topic in the OCR specification, in the order it's taught. Each one opens with a question you can’t yet answer, then works through it in missions with checks along the way. About 20 minutes each. No login.

👩‍🏫 Teachers: assign this courseAll six Velvet stages🎮 Revision Arcade
  1. 1Systems ArchitectureENIAC took days to reprogram. Your phone swaps apps instantly. Why?Start →
  2. 2Memory & StoragePull the plug and unsaved work is gone. So how does it boot?Start →
  3. 3Data storage and compressionWeb colours look like #FF8C00. Why letters and numbers?Start →
  4. 4Networks & TopologiesIf networks spread viruses, why does every school connect its PCs?Start →
  5. 5Network SecurityIn 2020, hackers hijacked famous Twitter accounts. What did they hack?Start →
  6. 6Systems SoftwareOne CPU core, three apps at once. How is that possible?Start →
  7. 7Ethical Legal Cultural IssuesLogging in with a friend's password just to look: is it a crime?Start →
  8. 8AlgorithmsWhy does the Tube map ignore real distances, yet still work?Start →
  9. 9Programming FundamentalsHow does a game turn 135 seconds into 2:15 on its timer?Start →
  10. 10Producing Robust ProgramsYou typed 41, not 14, for your age. Why did the form accept it?Start →
  11. 11Boolean Logic"Tea or coffee?" Would a computer's OR let you have both?Start →
  12. 12Programming Languages & IDEsWhy write a 1999 hit game almost entirely in assembly?Start →

More Computer Science

Same subject, other exam boards:

AQA GCSE Computer ScienceEdexcel GCSE Computer ScienceEduqas/WJEC GCSE Computer ScienceCambridge IGCSE Computer ScienceEdexcel International GCSE Computer Science

Other levels:

A-Level Computer ScienceIB Diploma Computer Science

All mini-lessons, every course →