Theory lessons
FreeShort, focused videos covering every IB Physics topic in the correct order, including revision notes.
IB Physics · SL & HL
Get Sirius about IB Physics
Sirius Study helps you understand the theory and put it into practice in order to help you master your IB Physics exams. Empathy is at the heart of what we do — and so is a sense of humour and joy about the subject!
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Past exam solutions
PlusSee how to solve every step of every question — what to write and what to avoid, with detailed videos and written solutions.
Course progress
FreeAlways see what you've completed, what's next, and how long is left before your exam.
How it works
Three steps to get started.
Create your account
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Choose your level and exam session
Select SL or HL and your upcoming exam session. We'll show you exactly how many days you have.
Follow the Physics course
Work through theory lessons in order, and get ready for your exams with detailed guidance and past exam solutions.
Everything you need for IB Physics
Sirius Study is built around one question: what does a student actually need in order to understand this topic and answer questions on the exams?
- Understand difficult Physics topics through clear, short videos
- See what you've completed and what lesson to continue next
- Learn exactly how IB exam answers should be structured
- Watch step-by-step walkthroughs of real exam questions
- Prepare for the actual paper format with strategic guidance
- Track how many days remain before your exam
Key conceptsAlpha, beta decayBinding energy
Free to start, Plus for exam preparation
The full theory course is free. Plus unlocks the exam preparation content.
Free
Genuinely useful for learning the theory.
€0 foreverGet started free- Complete IB Physics theory course
- 120+ topic video lessons
- Revision notes for each lesson
- Course progress tracking
- SL and HL content
Plus
6 monthsUnlock exam preparation and walkthroughs.
- Everything in Free
- IB past exam solution videos
- Step by step analysis of every question
- Written solutions to all exam questions
- Paper 1B preparation and theory videos
- Mark scheme commentary
- Common mistakes analysis
What students say
★★★★★
“The exam-answer videos completely changed how I write my extended responses. I finally understood what explain actually means in IB Physics.”
Priya M.May 2025 · HL
★★★★★
“I was completely lost on gravitational fields. The theory lesson was so clear — I rewatched it twice. Got a 7 on my unit test!”
Tom W.May 2025 · SL
★★★★★
“The IB past exam solutions are genuinely useful — not just generic advice.”
Fatima A.November 2025 · SL
Frequently asked questions
Is Sirius Study specific to IB Physics?
Yes. Sirius Study is focused on helping IB Physics students understand the course and prepare for its exams.
Can I use Sirius Study for SL and HL?
Yes. The theory course supports both Standard Level and Higher Level students.
What is free and what requires Plus?
The complete theory course is free. Plus adds exam-answer walkthroughs, paper strategy, and exam-preparation support.
When should I start using Sirius Study?
Start as soon as you begin IB Physics, or use it to revisit topics and prepare as your exam session approaches.
Can I jump between lessons freely?
Yes. You can revisit completed lessons whenever you need, while Sirius Study keeps the recommended next step clear.
Will new content be added?
Yes, we are continually adding new content. Next up are the full solutions to more IB past exams, along with specific guidance on exam papers and some fun surprises. If you have Plus, you will get all updates for free, automatically.
How do I access the memes?
Every subtopic has a meme folder that can only be unlocked if you do a specific set of actions. It's all for free, you just have to do something specific for each lesson in the subtopic. Email [email protected] for the details if you're stuck 🙂
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