ipassed.gg is a free revision platform built for the current IB Biology syllabus (first exams 2025). Practise 17,000+ topic-tagged questions across SL and HL, lock in weak areas with spaced-repetition flashcards, and track exactly where you stand — all in one place.
Customizing your study session takes less than a minute. Simply tap the topic cards above to select the specific biology topics you want to review, choose your desired number of questions, and generate your custom quiz. As you work through the questions, make sure to use our built-in blur function to hide the answers. Forcing your brain to retrieve the answer before revealing it is the fastest way to build long-term memory and true exam readiness.
Every one of our 17,000+ questions maps to the current IB Biology guide, tagged by theme and by SL/HL. Choose exactly what's on your course — no outdated material to wade through.
Rate each card as you study. The ones you keep missing are pulled into a "weak spots" deck and shown more often — spaced repetition that sends your time straight to the gaps in your memory.
Our blur tool hides the answer until you've actually tried to recall it, training the retrieval you'll need under real exam pressure instead of just re-reading notes.
You can practise as a guest — but signing in (it's free) unlocks the tools that make your revision genuinely smarter.
Once you answer a question correctly it won't come back. You're served unseen questions first, so your time goes to the material you haven't mastered yet — not stuff you've already nailed.
Your topic scores and quiz history save to your account, not just this browser — pick up exactly where you left off on your phone, laptop or school computer.
Your spaced-repetition decks and "weak spots" sync to your account, so your revision schedule is the same everywhere you sign in — and never resets.
See your latest quiz results and topic-by-topic progress at a glance, so you always know which areas to revisit next.
Unlock the percentile-ranked mock exams that open about two months before each official May and November exam session.
Save your daily Quizdle win streak to your account and climb the leaderboard.
About two months before each official IB May and November exam session, we open fixed-form diagnostic exams. They mirror real paper pressure and rank your score by percentile against other students sitting the same test — an unbiased read on your level while there's still time to act. Sign in to see upcoming dates on your dashboard.