What is spaced repetition and how does it help with certification study?
Spaced repetition is a learning technique where you review flashcards at increasing intervals based on how well you remember them. Cards you know well appear less frequently; cards you struggle with appear more frequently. Research consistently shows spaced repetition produces 200-400% better long-term retention than massed review (cramming). For certification study, it is particularly effective for memorizing port numbers, protocol names, acronyms, and ordered sequences that must be instantly recalled on the exam.
Spaced repetition is one of the most robustly supported techniques in learning science. Despite this, most certification candidates rely on re-reading and passive review rather than active recall with spaced intervals. Understanding how spaced repetition works and how to implement it for certification preparation gives candidates a significant retention advantage over those using passive review methods.
The Science Behind Spaced Repetition
Spaced repetition works by exploiting the "spacing effect" -- the well-documented finding that memory retention is significantly better when learning is distributed over time rather than concentrated in a single session.
The underlying mechanism involves memory consolidation. When you encounter information, it is initially stored in working memory. Recall practice stimulates the hippocampus to transfer information to long-term memory. If recall happens again before the memory trace has fully decayed, the trace is strengthened. The optimal interval for each review is just before the point of forgetting -- long enough to require genuine recall effort but not so long that the memory is lost.
The forgetting curve -- Ebbinghaus (1885) demonstrated that without review, approximately 50% of new information is forgotten within an hour, 70% within 24 hours, and 80% within a week. Spaced repetition counteracts this curve by scheduling reviews at intervals that maintain retention above a threshold.
Modern spaced repetition systems (SRS) like Anki use algorithms that calculate the optimal review interval for each card based on your performance history. This makes the spacing process automatic and personalized.
Setting Up Anki for Certification Study
Anki is the most widely used SRS for certification preparation. It is free for desktop and Android; $25 one-time purchase on iOS (which funds ongoing development). Available at apps.ankiweb.net.
Creating an Effective Certification Deck
Step 1: Organize by domain -- Create one deck per exam domain (e.g., "Security+ Domain 1: General Security Concepts"). This allows domain-specific review sessions and tracks progress by domain.
Step 2: Card types by content category:
| Content Category | Card Format | Example |
|---|---|---|
| Definitions | Term → Definition | "What is a rootkit?" → "Malware that hides in the OS/firmware and maintains persistent privileged access" |
| Acronyms | Acronym → Expansion | "PKI" → "Public Key Infrastructure" |
| Port numbers | Port → Protocol | "Port 22" → "SSH, SFTP, SCP" |
| Ordered sequences | Fill-in | "Step 3 of NIST incident response is ___" → "Containment" |
| Comparison distinctions | Scenario → Answer | "When should you use ECC vs RSA?" → "ECC provides equivalent security with shorter keys; preferred for mobile and IoT" |
Step 3: Card quantity -- Comprehensive Anki decks for CompTIA certifications typically contain 300-800 cards. Create cards progressively as you study each chapter rather than front-loading deck creation.
Step 4: Anki settings for certification study -- The default Anki settings work well for most candidates. Consider reducing the daily new card limit to 20-30 new cards per day to prevent review backlogs. Certification exams have large card counts; too many new cards create unmanageable daily review sessions.
Pre-Made Anki Decks for Certifications
Creating your own Anki deck from memory is the highest-value approach (the creation process itself reinforces learning). However, pre-made decks save time and can be used as starting points.
Where to find pre-made certification decks:
- AnkiWeb.net -- Community-shared decks at ankiweb.net/shared/decks/. Search for your certification name.
- Reddit -- r/CompTIA, r/AWSCertifications, and similar subreddits often have pinned links to community-created decks
- GitHub -- Several GitHub repositories contain open-source certification flashcard sets
Evaluating pre-made decks:
- Check the deck's download count and community reviews on AnkiWeb
- Verify the deck references the current exam version (not a retired version)
- Review 20-30 sample cards for accuracy before committing to the deck
- Supplement pre-made decks with cards you create for topics that proved confusing during practice exam review
"I downloaded a pre-made Security+ Anki deck with 600 cards, removed cards I already knew well, and added 100 new cards for topics that kept appearing on practice exams. That hybrid approach was more efficient than creating from scratch or using the pre-made deck unchanged." -- CompTIA certification candidate, r/CompTIA
Daily Spaced Repetition Routine for Certification Study
Morning (15-20 minutes): Complete your daily Anki reviews before any other study activity. Reviews are due based on your previous performance; completing them maintains the spaced intervals that drive retention.
During study sessions: Create new Anki cards when you encounter concepts in your study guide that qualify for memorization (definitions, formulas, sequences, port numbers). Creating cards immediately while the concept is fresh is more efficient than reviewing notes later to build cards.
Weekly: Review your deck statistics in Anki to identify cards that are repeatedly failing (showing as "learning" or "again" consistently). These represent genuine knowledge gaps that require additional study from your primary resource, not just more flashcard repetition.
Final two weeks: Reduce new card additions. Focus on reviewing existing cards to drive them into "mature" status (reviewed correctly multiple times with increasing intervals). Mature cards represent genuinely consolidated knowledge.
Flashcard Content for Specific Certifications
CompTIA Security+ SY0-701 Priority Cards
- Cryptographic algorithm types and key lengths (AES, RSA, ECC, DH)
- All port numbers with protocols and secure alternatives
- Attack type definitions (phishing variants, malware categories, network attacks)
- Incident response lifecycle phases in order (NIST and SANS)
- Authentication factor types with examples
- Risk response strategies (mitigate, accept, transfer, avoid)
- Compliance frameworks (PCI DSS, HIPAA, GDPR, NIST CSF, ISO 27001)
AWS Certifications Priority Cards
- AWS service definitions (EC2, S3, VPC, IAM, Lambda, RDS, DynamoDB)
- Service comparison distinctions (S3 vs EFS vs EBS, SQS vs SNS vs EventBridge)
- IAM components (user, group, role, policy types)
- Pricing models (On-Demand, Reserved, Spot, Savings Plans)
- Availability zones vs. regions vs. edge locations
- Security services (GuardDuty, Inspector, Security Hub, WAF, Shield)
Cisco CCNA Priority Cards
- OSI model layers with protocols at each layer
- Common routing protocols and their characteristics
- IOS show commands and their output
- Subnetting formulas (magic number method steps)
- IPv6 address types (link-local, unique local, global unicast)
- STP port states (blocking, listening, learning, forwarding)
Alternatives to Anki
While Anki is the most feature-complete SRS, several alternatives may suit different learning styles:
Quizlet -- More visual interface, easier to set up, less powerful algorithm than Anki. Good for candidates who find Anki's interface intimidating.
Brainscape -- Commercial SRS with pre-made decks for certification study. Less flexible than Anki for custom card types.
RemNote -- Note-taking app with built-in SRS. Useful for candidates who want flashcards integrated with their note-taking workflow.
Physical index cards -- Low-tech but effective for a few hundred cards. Useful for the final week review when shuffling deck order is beneficial.
Frequently Asked Questions
How long should I study with Anki each day? 15-20 minutes of daily Anki review is sufficient for maintenance and learning during active study. This should supplement, not replace, your primary study resources. The highest-value application of spaced repetition is rapid recall of facts you have already learned from your study guide, not initial learning of new concepts.
When should I start using Anki in my certification preparation? Start creating cards as soon as you begin reading your primary study guide. Creating cards concurrent with initial reading reinforces the content you are learning and builds the deck progressively rather than creating 400 cards in one session after finishing the book.
Should I use Anki or Quizlet for certification preparation? Anki's algorithm is significantly more sophisticated than Quizlet's and produces better long-term retention. For candidates comfortable with a simple but effective interface, Anki is the better choice. Quizlet is reasonable for shorter-term preparation or for candidates who find Anki's interface confusing.
References
- Ebbinghaus, H. (1885). Über das Gedächtnis: Untersuchungen zur experimentellen Psychologie. Duncker and Humblot. (Memory: A Contribution to Experimental Psychology.)
- Cepeda, N. J., et al. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354-380.
- Kornell, N., and Bjork, R. A. (2007). The promise and perils of self-regulated study. Psychonomic Bulletin and Review, 14(2), 219-224.
- Anki. (2024). Anki spaced repetition software. https://apps.ankiweb.net/
- Wozniak, P. A. (2018). History and effectiveness of spaced repetition. SuperMemo articles. https://www.supermemo.com/en/articles/history
- AnkiWeb. (2024). CompTIA and Cisco shared decks. https://ankiweb.net/shared/decks/