HSC Physics & Chemistry Specialists
HSC Sciences.
Summed Up.
Your child is capable of a Band 6 — but few students get there alone. Not knowing what to do next breeds uncertainty. We remove it, guiding them through the entire course — from the fundamentals to the Band 6 questions.
Band 6
5x more likely
Weekly
Homework · Spot tests
5x
more likely to achieve a Band 6
99.95
Highest ATAR achieved (2025)
50+
students ranked 1st at school in their Sigma subject(s) (2026)
2500+
top students have learnt with us
Trusted by top students from 140+ schools, including:
- Abbotsleigh
- Alpha Omega Senior College
- Barker College
- Baulkham Hills High School
- Carlingford High School
- Chatswood High School
- Cheltenham Girls High School
- Cherrybrook Technology High School
- Conservatorium High School
- Fort Street High School
- Girraween High School
- Hornsby Girls High School
- Hurlstone Agricultural High School
- James Ruse Agricultural High School
- Kambala
- Loreto Kirribilli
- Loreto Normanhurst
- Meriden School
- Normanhurst Boys High School
- North Sydney Boys High School
- North Sydney Girls High School
- Northholm Grammar
- Parramatta High School
- Penrith Selective High School
- Presbyterian Ladies’ College – Sydney
- Pymble Ladies College
- Reddam House
- SCEGGS, Darlinghurst
- Sydney Boys High School
- Sydney Girls High School
- Sydney Grammar School
- Sydney Secondary College, Blackwattle Bay
- The King's School
Sound familiar?
They’re smart.
They work hard.
So why are the marks stuck?
It’s rarely about effort. Most capable students plateau because a fundamental never quite locked in — and every module after it gets harder to hold together. They re-read notes, grind past papers, and the rank barely moves. What’s missing isn’t more work. It’s direction: knowing exactly what to fix, in what order — and proof that it’s actually fixed.
A student's story
Her worst subject became her Band 6.
“In Year 11, physics was my worst subject — I was ranked 103rd. For my first assessment in Year 12 after starting with Chris, I was ranked in the top 10! Without Chris, I most definitely would not have gotten a band 6 in physics.”
Wendy ZhangJames Ruse Agricultural High School · ATAR 99.65 · Physics 94
A parent’s story
The only regret? Not starting sooner.
“Thank you, Sigma Science! The materials and recorded classes are really good! We just wish our daughter would have joined your class earlier!”
Parentof a James Ruse HSC student
A student's story
“A Band 6 would be difficult” — then came Rank 2.
“I remember thinking that a Band 6 would be difficult. However, your amazing teaching style, boundless knowledge and constant reinforcement truly was the main driver behind my results. I moved from rank 100+ in Year 11 to Rank 2 by the end of Year 12.”
Steven KimBaulkham Hills High School · ATAR 99.80 · Physics 95
A parent’s story
Sigma has top teachers in front of the class, not just top scorers.
“My son spent Year 11 at the tutoring centres all his friends went to where he was being taught by top scorers, not top teachers — there's a difference, and my son felt it: With Sigma, he went from below the median to the top 10 in a single term. His friends followed. The materials are excellent, but above all it's the teaching that is so much better at Sigma.”
Parentof a James Ruse HSC student
Why Sigma
Specialists, not generalists.
We teach two subjects and we teach them exceptionally well. Every lesson is built to make hard science click — and stick.
Physics & Chemistry only
Deep subject expertise from teachers who live and breathe the HSC syllabus — including HSC examination markers. No diluted, one-size-fits-all teaching.
Lessons they enjoy
Engaging, clear and genuinely interesting. Students stay switched on because they actually want to be there.
Marked every week
Weekly homework with written feedback, plus marked weekly spot tests in Year 12 — so you always know exactly where the marks are going.
Full Course Recordings
Missed a class or want to revise? Recordings are available for the duration of your enrolment.
Learning inside our Parramatta campus
Courses
Pick your path to a Band 6.
Purpose-built programs for every stage of the senior sciences.
Enrolments close Fri, Aug 28
10-week term · 1-hour lessons
Year 10Preliminary Prep
A head start on senior science — build the foundations before Year 11 even begins.
- Bridging the key Year 11 concepts
- Study & exam skills
- Weekly homework
- Early access to Year 11 bookings
- $450
- per term, 1 subject
- $750
- both subjects
Enrolments open mid–late Sep 2026
8-week terms · 1h 45m weekly (Accelerated)
Year 11Physics & Chemistry
Accelerated classes that finish Year 11 content early — so Year 12 starts on the front foot.
- Assessment & exam prep
- Marked weekly homework with feedback
- Out-of-class support
- End-of-module examinations
- Lesson recordings for the duration of enrolment
- $750
- Regular price $850, Early Bird
- per term, 1 subject
- $1,300
- Regular price $1,500, Early Bird
- both subjects
Lessons commence October 2026
Enrolments open NOW
Currently Studying: Module 5
9-week terms · 2h 45m weekly
Year 12Physics & Chemistry
The full HSC year: content mastered, technique drilled, and marked work every single week.
- Assessment & exam prep
- Marked weekly homework with feedback
- Marked weekly spot tests
- End-of-module examinations
- Out-of-class support
- Lesson recordings for the duration of enrolment
Early Bird prices apply when payment is made before the Early Bird period ends. Second subject is discounted.
The Results
Numbers that speak for themselves.
Real HSC marks from real Sigma students — not averages, not estimates.
Physics
99 Ext (#1 in State)
987th in State
Yonas TibebuGlenwood High School
Physics
98State Rank
Name withheldSchool withheld
Chemistry
98State Rank
Name withheldSchool withheld
Physics
ATAR 99.75
976th in State
Lanthian SueParramatta High School
Physics
ATAR 99.90
979th in State
Shiva BhattGirraween High School
Physics
96ATAR 99.95
Rohan GuptaBaulkham Hills High School
Physics
96ATAR 99.95
Andrew LeeBaulkham Hills High School
Physics
96ATAR 99.95
Rahul DesaiBaulkham Hills High School
Physics
96ATAR 99.90
Arnav DesaiBarker College
Physics
96ATAR 99.85
Dhomya GirotraJames Ruse Agricultural HS
Physics
Ext 97
96ATAR 99.95
Eddie LiBaulkham Hills High School
Physics
96ATAR 99.75
Dhruv NagpalParramatta High School
Physics
Ext 97
96ATAR 99.40
Jacob MakmurNormanhurst Boys High School
Physics · Chemistry
95 · 96ATAR 99.90
Name withheldSydney Girls High School
Chemistry
95
Aanya GuptaBlacktown Girls High School
Physics
95ATAR 99.95
Brian ChaoBaulkham Hills High School
Physics
95ATAR 99.80
Steven KimBaulkham Hills High School
Physics
95ATAR 99.50
Vincent RuanNBSC, Manly Campus
Physics
Ext 95
94ATAR 99.85
Krishita UppalapatiBaulkham Hills High School
Physics
94ATAR 99.70
Winnie ChenJames Ruse Agricultural HS
Physics
94ATAR 99.65
Wendy ZhangJames Ruse Agricultural HS
Physics
94ATAR 99.25
Taran PillaiGirraween High School
Chemistry
93Exam mark 97
Sathmi RanasingheJames Ruse Agricultural HS
Chemistry
92Rank 1
Halima El-ZahabAl Amanah College
Results as published by our students. Individual results depend on individual effort — we make no guarantee of a particular mark.
The Sigma Mastery Engine
Prove it. Don't just review it.
Most tutoring reviews a mistake once and moves on. Inside the Sigma student portal, the Mastery Engine will keep working on every lost mark until your child can prove — again and again, on fresh questions — that it's truly fixed.
01 · Capture
Every lost mark — in class, homework, quizzes or practice exams — will go into your child's personal Error Book, tied to the exact syllabus idea behind it. The same idea missed twice will be one tracked weakness, not two.
02 · Fix
They'll re-attempt fresh questions built around the exact one they got wrong — not random questions on the topic. Three right in a row, and it will count as fixed.
03 · Prove
Days later, the idea will quietly come back in normal practice. Get it right again across separate sessions and it will be marked mastered — and cleared from the Error Book.
04 · Retain
Even after mastery, the engine will re-check at widening intervals. If your child slips, the gap will reopen automatically — so it's never truly lost.
Nothing falls through the cracks
Every mistake will be tracked all the way to mastery — not glanced at once and forgotten.
Practice that targets their weak points
Work will be built around your child's actual errors, not generic worksheets.
Confidence that's earned
Mastery will be demonstrated on fresh questions — never assumed from "I get it now".
Progress you can actually see
Students and parents will watch gaps close, concept by concept.
The student portal also includes
- Full recordings of every lesson
- Daily quiz & leaderboard
- Practice & mock exams with instant feedback
- Weekly study planner & spaced revision
- An AI study companion for on-demand help
- Parent progress insight, incl. predicted HSC band
Included with every Sigma enrolment — launching soon for HSC 2027 students.
Our Team
One team. Two subjects.
Handpicked for knowledge and communication — including HSC examination markers and former state-ranking students.
Chris Williams
Owner · Physics
15+ years teaching HSC Physics & Chemistry, HSC Examination Marking experience. GOAT of dad jokes.
Dr Vidya Bandodkar
Chemistry
20+ years teaching Chemistry in Australia and the USA; mentors to students and teachers alike.
Chris Hickman
Chemistry
10+ years teaching Chemistry in Australian schools, with multiple students placing first in HSC Chemistry across his archdiocese.
Ebony Larrea
Physics
Approaching 10 years teaching, and a former state-ranking science student herself.
Jake Xu
Chemistry
Former Sigma student — 10+ years teaching HSC Chemistry to high-achieving students and multiple first-in-school results.
Edwin Samuel
Physics
Former Sigma student — 3+ years teaching at Sigma with multiple first-in-school results. Studying BMedSc/MD at UoN.
Shiva Bhatt
Physics
Former Sigma student — Girraween 2023, ATAR 99.90, a state rank in HSC Physics and multiple first-in-school results.
Prapann Malavia
Physics
Former Sigma student — Baulkham Hills 2023, ATAR 99.80, HSC Physics 95 and multiple first-in-school results.
Even our admin staff are chosen based on their knowledge and communication skills.
Vedanth Raj Nandakumar
Admin
Baulkham Hills High 2024. All rounder. Ready to help with any Phys/Chem/Maths related questions.
Pranav Mehta
Admin
Carlingford High 2024. Band 6 in the 8 units that actually matter. Ready to help with any Phys/Chem/Maths related questions.
Vincent Pham
Admin
Baulkham Hills High 2024. Band 6 in the 8 units that actually matter. Ready to help with any Phys/Chem/Maths related questions.
Ansh Ahuja
Admin
Baulkham Hills High 2024. Band 6 in the 8 units that actually matter. Ready to help with any Phys/Chem/Maths related questions.
Reviews
What our students say.
“Truly a fantastic teacher. He knows the ins and outs of the course better than anyone and his passion for teaching really translates, everyone in my class enjoyed his lessons. The best tutor you will find. Enough said.”
“Simply amazing. Never stopped helping. The way he teaches concepts and focuses on examination technique was what enabled me to state rank in HSC Physics.”
“I personally found Chris to be the most helpful tutor I had ever been in contact with — not only are his notes great and his teaching essentially perfect, but more importantly he's just an awesome and friendly guy who makes lessons 110% interesting and enjoyable for everyone.”
Questions
The things parents ask first.
Everything else is on the FAQ page — or just call us.
- Are the courses available online?
- Our face-to-face students have access to lesson recordings through our online portal, so nothing is missed if you can't make a class.
- Do you offer free trials?
- Because most classes fill before courses commence, we only offer trial lessons after courses have started. If you discontinue during a term, we offer a prorated refund.
- Do you offer any discounts?
- Yes — an Early Bird discount each term when payment is made before the Early Bird period ends, plus a discounted rate on your second subject.
Ready to sum up your HSC sciences?
Classes fill before term starts. Secure a position in Physics or Chemistry at our Parramatta campus — or join us online.