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Updates

What is new on chermistry.com — added whenever something new goes live.

  1. New

    Your marked homework, in one place

    The Bridging page has a new My submissions tab: sign in, and you can see everything you handed in and download Mr Cher's marked copy once it is ready.

    Take a look →
  2. Improved

    Question banks now match the P1 Driller

    When a teacher takes a question out of the P1 Driller as out of syllabus or faulty, the Chemistry, Physics and Biology question banks now show the same: out-of-syllabus questions are marked, and faulty ones are hidden until they are fixed.

    Take a look →
  3. New

    School question banks for Physics and Biology

    The Physics and Biology school prelim question banks now have cards on the main menu, and Biology has its own Question Banks section with the SG, international and school banks. Both school banks now open with the usual notes bar at the top.

    Take a look →
  4. Improved

    Question banks now look and work the same

    Every question bank now has the same one-row filter bar, and the syllabus tick-boxes turn questions green when they are relevant and red when they are not. The Biology question bank now has the Biology notes menu bar.

    Take a look →
  5. New

    Biology P1 Driller is here

    Drill O-Level Biology Paper 1 multiple choice every day, for G3 Pure Biology or G3 Science (Biology). Every question is marked at once and explained, with most questions on the outcomes the 2026 paper did not test.

    Take a look →
  6. Improved

    Biology question bank: learning-outcome tags

    Every Biology question is now tagged to the official learning outcomes for G3 Pure, G3 Science and G2 Science. Filter by learning outcome, and questions outside your course are marked OOS and kept out of the MCQ Driller.

    Take a look →
  7. New

    SG Biology Question Bank

    Every Singapore O Level and N(A) Biology ten-year-series question is now searchable, with answers, in one place.

    Take a look →
  8. New

    Send pictures to Ask CherAI

    You can now paste (Ctrl+V), drop or attach a picture in Ask CherAI, on every notes page and in the P1 Drillers, and it will read it. In the drillers, tick Include the current question to ask about the question on your screen.

    Take a look →
  9. New

    Ask CherAI in the P1 Driller

    Stuck on a Paper 1 question? Open Ask CherAI in the Chemistry and Physics drillers. It knows the question on your screen and gives hints until you answer. Signed-in students can ask 100 questions a day until 11 Nov.

    Take a look →
  10. Improved

    Question Banks, all in one place

    Every question bank now sits in its own Question Banks section on the Chemistry, A-Level Chemistry and Physics pages, including the Cambridge, School and Physics banks.

    Take a look →
  11. New

    New: Physics P1 Driller

    Daily Paper 1 practice for Pure Physics and Science Physics, with questions from Singapore and Cambridge papers, instant marking with explanations, a question timer and timed rounds.

    Take a look →
  12. Improved

    Physics question banks: new look

    Both physics question banks now look like the chemistry bank: one list where each question opens in place, with the original paper, the answer right underneath, and Copy link and Save. They also appear in the Physics Content menu.

    Take a look →
  13. Improved

    Biology notes: new diagrams and a better food-tests practical

    The cells, enzyme and heart diagrams have been redrawn, there is a drag-and-drop food-tests activity, and every question now has a short title.

    Take a look →
  14. New

    Biology notes now have diagrams and interactives

    Every Biology concept now has a labelled diagram, and many have a hands-on activity to try. Phone-friendly versions load automatically, and each diagram shows only what your course needs.

    Take a look →
  15. Improved

    P1 Driller: choose your question banks

    Tick which banks your daily questions come from: Singapore exams, Cambridge international exams or school prelims. The driller now has over 4,000 Pure and 2,700 Science questions.

    Take a look →
  16. New

    New: P1 Driller (100 MCQs a day)

    Practise Paper 1 with questions from the SG, international and school banks. Aim for 100 a day; every answer is marked with an explanation, and most questions target the topics the 2026 structured paper did not test.

    Take a look →
  17. Improved

    Question banks free until 11 Nov

    The SG, international and school chemistry question banks are open to everyone for exam revision until 11 November, 11:59 pm.

    Take a look →
  18. New

    2026 Physics Paper 2 analysis and suggested solutions

    Both Physics analysis pages now have a 2026 P2 Analysis tab: suggested solutions with textbook quotes, general sentiments, the topic heat map, how it compared with our prediction, and the outcomes not tested. These are unofficial solutions written by us.

    Take a look →
  19. New

    Diagram Studio: make your own maths diagrams

    Pick one of 171 maths figures, change its numbers, drag its labels and corners, and shade parts with a click. Download it as a picture or print it at real size.

    Take a look →
  20. New

    Cambridge Math Diagrams

    Every diagram from the Cambridge IGCSE Maths (0580), Additional Maths (0606) and O Level Additional Maths (4037) past papers, 1,078 figures cut out and sorted by topic. Sign in to browse, search and download them.

    Take a look →
  21. Improved

    A-Level Chemistry notes: practise MCQs with hints

    Past-year multiple-choice questions in the notes now have clickable options, a Show hint button and a Show answer button. A wrong choice turns red; the right choice shows the explanation. Use the camera button to see the original paper.

    Take a look →
  22. New

    Biology notes are here

    The first Biology notes are open: Movement of Substances (diffusion, osmosis and, for Pure, active transport) with past-paper practice and drills, plus a syllabus comparison for Pure, Science and G2.

    Take a look →
  23. New

    Hand in paper homework with photos

    Did your bridging homework on paper? Open 'Did it on paper? Hand it in with photos' in that day's homework tab, add a photo of each page and press Submit photos.

    Take a look →
  24. ImprovedNew

    A-Level Data booklet and syllabus pop-up

    The Data booklet pop-up now scrolls through every page, and has a new Syllabus tab with the H1 (8873) and H2 (9476) syllabuses to read in the same pop-up.

    Take a look →
  25. Improved

    A-Level Data Booklet opens in a pop-up

    The Data booklet button in the A-Level top bar now opens the booklet in a pop-up on the page, with a page picker, zoom and a PDF link, instead of a new tab.

    Take a look →
  26. New

    New video: spotting a compression and a rarefaction

    Not sure how to find a compression or rarefaction on Fig. 10.12? A new animated explainer in Physics 10.4 Sound shows how to spot them in the layers of air and on the graph.

    Take a look →
  27. New

    Physics practice Paper 2s with mark schemes

    Ten Science Physics practice Paper 2s and one Pure Physics Paper 2, each with a full mark scheme that quotes the textbook word for word. Together the ten Science papers test every learning outcome.

    Take a look →
  28. Improved

    Worked answers now to 3 significant figures

    Every rounded answer in the physics worked examples is now given to 3 significant figures. Answers that come out exactly are unchanged.

    Take a look →
  29. Improved

    Physics Summary now matches your level

    Each Summary tab now shows only what your syllabus (G3 Pure, G3 ScPhy or G2 ScPhy) covers, and the Light notes gain ray diagrams for every object distance.

    Take a look →
  30. New

    6 more Paper 1 practice sets, graded Easy, Medium and Hard

    Science and Pure Chemistry each get six new multiple-choice sets covering the whole syllabus. Every question is labelled Easy, Medium or Hard, and each set is graded, so you can start gently and work up. Full mark schemes are included.

    Take a look →
  31. Content

    Light: new exam question and a lens correction

    Section 12.4 has a new worked question on a scale ray diagram (four rays, focal length, magnification). When the object is at F, the image is now described as virtual, upright and magnified, as in the textbook.

    Take a look →
  32. New

    Physics past-paper analyses

    New analyses of every past Science (Physics) and Pure Physics paper, 2010 to 2025: topic heat maps, syllabus changes and what to revise first. Find them in the Content menu of the Physics notes.

    Take a look →
  33. New

    Science Physics past-paper analysis

    A new analysis of every Science (Physics) Paper 1 and Paper 2 from 2010 to 2025: topic heat map, what changed in the new syllabus, and which topics to revise first.

    Take a look →
  34. Improved

    MCQ answers show straight away

    In the International Paper Question Bank, the mark-scheme answer for each multiple-choice question is now shown immediately — no extra click needed.

    Take a look →
  35. New

    5 new Paper 1 practice sets for the 2026 syllabus gaps

    Four new multiple-choice specimen Paper 1 sets for Science Chemistry and four for Pure Chemistry (plus the earlier forecast paper), built from the learning objectives the Oct/Nov 2026 papers did not test. Each comes with a mark scheme that explains every option.

    Take a look →
  36. Improved

    A-Level Ten Year Series is free

    The H1 and H2 Chemistry Ten Year Series (2016 to 2025 papers, with answers and worked explanations) now opens for everyone, no premium account needed.

    Take a look →
  37. NewContent

    The real 2026 papers, analysed

    The Oct/Nov 2026 Pure Chemistry Paper 2 and Science (Chemistry) Paper 3 are in. A new '2026 Analysis' tab on each theory-analysis page reviews the paper, maps its topics, checks it against our forecast and lists every syllabus outcome it did not examine, which is where Paper 1 will look next.

    Take a look →
  38. Improved

    Question banks renamed

    The O-Level bank is now the SG Question Bank, shown with its syllabus codes, and the Cambridge bank is now the 0439 Intl Question Bank. The Content menu uses the new names too.

    Take a look →
  39. Improved

    New particle diagram in the Physics Summary

    The Kinetic Particle Model summary now shows solid, liquid and gas side by side, so you can compare how the particles are arranged.

    Take a look →
  40. New

    A-Level Chemistry: Revision Summary page

    A new page after Chapter 14 puts every chapter's summary (mind map, key diagrams, tables and flowcharts) in one place, one tab per chapter.

    Take a look →
  41. New

    Physics notes: summaries for every chapter

    Every physics chapter now has a Summary tab with a mind map, key definitions, comparison tables, flowcharts and common exam traps. A new Summary page after Chapter 20 collects all 20 chapters in one place.

    Take a look →
  42. Improved

    A-Level Chemistry: visual chapter summaries

    Each chapter's Summary tab now has a mind map, key definitions, comparison tables, flowcharts and common exam traps, so it is quicker to revise from.

    Take a look →
  43. Improved

    A-Level Chemistry notes: new look

    Each chapter now opens with a short introduction, has a collapsible contents list and a one-page chapter summary, and the syllabus Compare tab spells out every learning outcome in full.

    Take a look →
  44. NewContent

    AL Chemistry videos: 84 now

    The A-Level Chemistry video collection has grown from 57 to 84 videos, with more pause-and-think questions, a practice question after every video, and links from the notes sections that had none.

    Take a look →
  45. ImprovedContent

    Updated 8-bit summary videos

    The Chemistry summary videos have been refreshed. In Chapter 11 all six videos now sit side by side on the Summary tab.

    Take a look →
  46. New

    New: G1 Sci

    A new G1 Sci tab with Lower Secondary and Upper Secondary theory resources (coming soon), and a new G1 Sci bay in the 3D library.

    Take a look →
  47. NewContent

    8-bit summary videos for the Chemistry notes

    Every chapter's Summary tab now opens with a short 8-bit video (six for Organic Chemistry). They are made for G3 Science (Chemistry), and you can also find them all in the new Summary tab on the Videos page.

    Take a look →
  48. Improved

    Bridging homework you can print

    Each day's homework on the Sec 1 G2 → G3 bridging page now has a Download blank sheets (PDF) button, so you can print it and work on paper. Every day and tab also has its own link to share.

    Take a look →
  49. Content

    New triangle construction walkthrough

    Sec 1 Chapter 11 now has a step-by-step walkthrough for constructing a triangle from one side and two angles. Walkthroughs in the Sec 1, Sec 2, E-Math and A-Math notes now all use the same full-width bars.

    Take a look →
  50. New

    Sec 1 G2 → G3 bridging programme

    Moving up from G2 to G3 Maths? Three days of lessons cover the 17 Sec 1 ideas G3 expects, each with worked examples, plus a homework you can write on and hand in online.

    Take a look →
  51. NewContent

    Ten Paper 3 practice papers, with mark schemes

    The Science (Chemistry) specimen page now has ten different Paper 3s (3.1 to 3.10), plus Pure Papers 1 and 2. Every paper has a free mark scheme.

    Take a look →
  52. New

    Mark schemes for all specimen papers

    Every specimen paper (Science Chemistry Paper 1 and 3.1-3.5, Pure Chemistry Papers 1 and 2) now has a free mark scheme next to it, so you can mark your own attempt.

    Take a look →
  53. New

    More specimen papers: 5 Chemistry Paper 3s and Pure Chemistry papers

    The 2026 forecast pages now have five different Science (Chemistry) Paper 3 practice papers (3.1 to 3.5) plus Paper 1, and Pure Chemistry Papers 1 and 2. Every tab now has its own link.

    Take a look →
  54. New

    New game: Hog Run

    A piggy arcade adventure. Pick Bacon or Maggie, drag back and let go to launch, then roll, steer and gas your way across the farm. Play it in 3D or 2D.

    Take a look →
  55. New

    2026 specimen papers + free theory analysis

    Try two practice papers (Paper 1 and Paper 3) built from our 2026 topic forecast for Science (Chemistry). Both analysis pages are now free.

    Take a look →
  56. Improved

    Theory paper analysis is now free

    The Pure and Science (Chemistry) theory paper analyses are open to everyone. See which topics each year's Paper 1 and structured paper tested, and read a 2026 forecast for each paper.

    Take a look →
  57. Improved

    AL Chemistry notes: wording and answer fixes

    We checked every chapter of the AL Chemistry notes and tightened definitions, worked-example wording and Check-yourself answers, with new definitions where the syllabus asks for them.

    Take a look →
  58. New

    H1 / H2 syllabus view in the AL Chemistry notes

    Every AL Chemistry notes chapter now has a Syllabus tab showing the official H1 and H2 learning outcomes, with links to the sections that cover them, and a Compare view for the two levels.

    Take a look →
  59. Improved

    Every video now has a short description

    Chemistry, physics, E-Math and A-Math videos in the notes now show a short description above the player, so you can see what you will learn before you press play.

    Take a look →
  60. New

    New: fats, oils and margarine (Chemistry 11.2)

    The Hydrocarbons notes now explain fats, oils and margarine step by step, with diagrams, a short animated video and 17 new questions, including past-paper ones.

    Take a look →
  61. Improved

    Chemistry Practical: Tips & Tricks

    The Practical notes for G3 Pure (Paper 3) and G3 ScChem (Paper 5) now give short Tips & Tricks on every question, so you can see how to earn the marks. Choose your level at the top.

    Take a look →
  62. New

    Physics Practical: technique notes and Pure Paper 3

    The Physics Practical page now has technique notes on precision, tables, graphs and errors for everyone, plus G3 Pure Paper 3 past papers (2018 to 2022 and 2026, with 2023 to 2025 coming). Pick your level at the top.

    Take a look →
  63. Improved

    Question bank joins the Chemistry notes menu

    The O-Level Chemistry question bank now has the same top bar as the notes, and you can open it from the Content menu. Its level follows the bar's All / G3 Pure / G3 ScChem / G2 ScChem buttons.

    Take a look →
  64. New

    O Level Chemistry Question Bank

    A premium bank of Pure, Combined and NA past-paper questions from 2016 to 2025, with topic filters and a view of each original paper. Find it under OL Chemistry > Theory Resources.

    Take a look →
  65. Improved

    Notes: Content is now a dropdown

    On the Chemistry, Physics, Science and Math revision notes, the Content button is one dropdown. Open it to jump to any chapter, or pick Table of contents at the top for the full list.

    Take a look →
  66. Content

    2026 E-Math Paper 2: analysis and mark scheme

    See which topics the real 2026 Paper 2 tested, how they compare with the predictions, the combined Paper 1 + 2 picture, and worked solutions with method, independent and accuracy marks for every question.

    Take a look →
  67. NewContent

    Exam questions under the O-Level and Lower Sec videos

    Chemistry, Physics and Lower Sec Science videos now end with a past-year exam question, with hints and a worked explanation that turns green when you get it right and red when you do not.

    Take a look →
  68. New

    Chapter overview pages for every subject

    The Content button in the notes now opens a page listing every chapter, and the small arrow beside it still jumps straight to a chapter.

    Take a look →
  69. ImprovedContent

    AL Chemistry videos: exam questions

    Every AL Chemistry video now ends with a past-year exam question with hints and a worked explanation. The videos also have more pause-and-think checkpoints, plainer wording and a new layout.

    Take a look →
  70. New

    Updates page

    You are here. Whenever something new goes live it is listed on this page, and the Updates button glows until you have seen it.

    Take a look →
  71. Improved

    Math page tidied

    The empty Secondary 2 Math interactives section has been removed. S2 Math Notes are unchanged.

    Take a look →
  72. New

    The Shop and the Shopkeeper

    A new Shop button in the menu, and an old wizard Shopkeeper at the far end of the library. Click him to visit the Shop. The shelves are still being stocked.

    Take a look →
  73. Improved

    Chemistry is now OL Chemistry

    The O-Level Chemistry section has a new name and a Games sub-section, and AL Chemistry and Games now have dropdown menus too.

    Take a look →
  74. New

    New game: CATALYST: The Broken Formula

    A chemistry role-playing game. Find it under Games > Revision Games and under the new OL Chemistry > Games section. Best on a desktop with a keyboard.

    Take a look →
  75. Fix

    Jump Quest: stray icon removed

    A leftover icon above the Main menu bar on the Jump Quest page is gone, so the game now sits right under the bar.

    Take a look →