Practice that adapts to you
An intelligent AP Computer Science exam prep platform — powered by the FSRS memory algorithm and GPT-4o AI — that personalizes every session to your skill level, tracks progress transparently, and keeps parents informed every step of the way.
No credit card required.
Learn smarter, not harder
Every feature is designed to maximize your AP score with less wasted study time.
Adaptive Practice
Questions automatically adjust to your skill level using M-Elo, an Item Response Theory model, keeping you in the optimal learning zone — not too easy, not too hard.
- M-Elo algorithm targets the 55-80% "desirable difficulty" zone
- 4-tier difficulty system (Scaffold to Challenge)
- "Fix Next" recommendations after every session
Spaced Repetition
A built-in memory engine powered by FSRS — modeling the Ebbinghaus forgetting curve — schedules reviews at the exact moment you're about to forget, targeting 90% long-term retention.
- FSRS algorithm: R = (1 + t/9s)^(−1) models your memory decay
- Configurable session lengths (3, 5, or 10 min)
- Recovery, Balanced, and Exam-Soon focus modes
Real Exam Simulation
Full-length timed mock exams that mirror actual AP conditions, with FRQ practice and Bluebook-style code display.
- 42-question timed mock exams with estimated AP score
- AI-graded FRQ responses scored against official AP rubrics
- In-app Quick Reference identical to exam day
Instant Help When Stuck
GPT-4o-mini powered hints guide you toward the right thinking without giving away the answer. Every question has a full explanation.
- GPT-4o-powered hints that identify your specific misconception
- Step-by-step correct reasoning walkthrough
- Code trace viewer shows execution line by line
Mistake Notebook
Every wrong answer is saved with the full context — question, your choice, correct answer, and explanation — in one searchable place.
- Self-tag mistakes (off-by-one, misread, etc.)
- Error trend charts over time
- Turn mistakes into targeted study sessions
Track Your Growth
Visual topic mastery map, practice heatmap, and detailed session recaps show your progress over time.
- Topic mastery: Focus → Learning → Mastered
- GitHub-style practice heatmap (30/60/90 days)
- Session recaps with per-topic accuracy breakdown
Stay Motivated
Earn XP, level up, maintain daily streaks, and unlock badges from Common to Legendary.
- XP for every question answered
- Daily streak counter
- 18+ achievement badges with rarity tiers
Flexible Study Modes
Standard sessions (10–20 questions), micro-bite sessions (5 questions in ~3 min), homework mode, and revision mode.
- Micro-bite: perfect between classes
- Homework: auto-generated from recent mistakes
- Revision: flashcard drills with spaced repetition
Multiple Exams, One Platform
Enroll in AP CSA, AP CSP, or IGCSE Computer Science — with separate progress tracking for each.
- Switch between exams anytime
- Independent mastery tracking per exam
- Unified dashboard for all enrolled exams
Know exactly where your child stands
Stay informed without hovering. Every metric is transparent, evidence-based, and easy to understand.
See Exactly Where Your Child Stands
A clear readiness band (On Track, Needs Focus, At Risk) driven by M-Elo skill modeling, plus an estimated AP score range updated with every session.
- Week-over-week accuracy & consistency trends
- 5 visual KPIs at a glance
- Projected exam score based on real performance data
Know What Needs Attention
"Fix Next" priorities ranked by urgency (OK / Watch / Urgent), plus error trend analysis and support signals.
- Study consistency and session completion signals
- Help-seeking behavior tracking
- Plain-language explanations of what each signal means
Countdown to Exam Day
A visual D-Day roadmap with phased study plan, score targets, and a Bluebook exam-day checklist.
- Topic coverage, FRQ accuracy, mock exam targets
- Exam-day preparation checklist
- Phased plan: what to focus on now vs. later
Compare Against National Standards
See College Board score distributions, national FRQ averages, and Chief Reader expectations.
- Official score distribution data
- FRQ national mean comparison
- Key expectations from official grading rubrics
Stay Connected with the Teacher
Watch teacher video updates, read timestamped comments, and book consultations with one click.
- Teacher video messages with key wins & action items
- Timestamped progress notes
- One-click consultation booking
"Show Me Why" Transparency
Every claim on the dashboard can be expanded to show the underlying data — sample size, recency, coverage, and stability. Built on Item Response Theory probability models.
- No black boxes — see exactly what the data shows
- Evidence drawer for every metric powered by M-Elo and FSRS
- Confidence indicators based on data quality
Easy Access, No Login Required
Parents receive a secure link to view their child’s dashboard. Shareable with tutors, grandparents, or anyone supporting the student.
- Token-based secure access
- Works on any device (phone or desktop)
- Share with extended family or tutors
Monitor Homework & Assignments
See all teacher-assigned homework with status, due dates, accuracy scores, and completion rates.
- Pending, in progress, and completed statuses
- Practice activity heatmap calendar
- Know if assigned practice is being finished on time
Bilingual & Multilingual Support
The parent dashboard is available in 6 languages: English, Korean, Chinese, Japanese, French, and Arabic (with RTL support).
- Teacher updates include bullet-point summaries
- Full dashboard translation
- Right-to-left layout for Arabic
Five Key Metrics at a Glance
A visual dashboard showing Readiness, Accuracy, Study Progress, Consistency, and Assessment Confidence.
- Radial KPI visualizations
- Color-coded status indicators
- Updated in real time as your child practices
Everything you need in one place
Built by teachers, powered by research, designed for real results.
Personalized Difficulty
Every student gets questions matched to their level
6 Languages
EN, KO, ZH, JA, FR, AR — accessible to international families
Multiple Exams
AP CSA, AP CSP, and IGCSE CS on one platform
GPT-4o AI Assistance
Hints, step-by-step explanations, and FRQ grading powered by GPT-4o-mini
Evidence-Based Metrics
Every number is backed by M-Elo and FSRS — transparent, verifiable data
Mobile-Friendly
Study or check progress from any device
Teacher Integration
Direct communication between teacher, student, and parent
What our approach delivers
“Know exactly where your child stands”
Real-time readiness bands and transparent progress tracking give parents clarity without guesswork.
“Practice that adapts to you”
An adaptive difficulty engine ensures every session is in the optimal learning zone.
“Every mistake becomes a lesson”
A searchable mistake notebook, error trends, and AI hints turn wrong answers into growth.
“Exam day, no surprises”
Full-length mock exams, score projections, and a Bluebook checklist mean students walk in prepared.
“Stay in the loop without hovering”
Shareable dashboard links, teacher updates, and support signals keep parents connected.
“Study smarter in 3 minutes”
Micro-bite sessions and spaced repetition make productive study possible even between classes.
“See the proof”
The "Show Me Why" transparency feature lets parents expand any metric to see the underlying data.
“From anxious to confident”
Gamification, streaks, and visible progression turn exam anxiety into exam readiness.
Ready to ace your AP exam?
Join students who are studying smarter with adaptive practice, real exam simulations, and AI-powered help.
No credit card. No subscription. Start practicing now.