Trinity MathsLab · Company
Trinity Press makes printed textbooks and digital content together, and our learning app 111sm connects a student's handwritten working with reviewing mistakes.
Company newsIn October 2026, Trinity MathsLab joined Anthropic's startup program, Claude Startups, as a member. Through the program we use the Claude Team plan, API credits, and technical sessions with Anthropic's Applied AI team.
Trinity Essence Concepts
Trinity Solid Drills
Trinity Target Problem solving
01 / What we make
In public beta · full service due 14 December 2026
111sm.app
Students solve past papers and topic questions, mark answers read from their handwriting, and retry only what they missed, in the browser or the iPhone, iPad and Android apps.
Open 111sm.app Get the iPhone and iPad app on the App Store Get the Android app on Google Play
785 past papers 23,240 questions · web edition
Due 14 December
Essence · Solid · Target
Essence for concepts, Solid for drills, Target for problem solving. One manuscript produces the printed book, the lesson slides and the app questions.
2,907 questions Nine books, 99 chapters · Common Maths 1, Algebra, Geometry
02 / 14 December line-up
The nine textbooks and the seven books of 100 adapted mock-exam questions are due on 14 December. A core question-type book and two series of mock papers are candidates for the same day.
| Line-up | Books | Chapters | Questions | Status |
|---|---|---|---|---|
| Three textbook series Common Maths 1, Algebra, Geometry | 9 books | 99 chapters | 2,907 | Due 14 Dec |
| 100 adapted mock-exam questions 7 subjects | 7 books | 22 chapters | 700 | Due 14 Dec Manuscripts, independent re-solving and the overlap re-check done · design in review |
| School-exam mock papers 7 subjects × 8 papers · 22 questions each | 56 of 56 papers | – | 1,232 | Candidate · 14 Dec All 56 re-solved independently and re-checked for overlap |
| Adapted March mock papers Years 10 and 11 × 2024–2026 · 30 questions each | 6 of 6 papers | – | 180 | Candidate · 14 Dec All 6 re-solved independently |
| Core question types Matched to curriculum units | 3 subjects | 21 units | 366 of 366 | Candidate · 14 Dec All 366 re-solved independently · Common Maths 1, Algebra, Geometry |
| Three series · four more subjects Manuscripts in progress | 12 books | 111 chapters | 3,396 | In progress · no date yet |
| 111sm app 111sm.app · past papers, web edition | 785 papers | – | 23,240 | Live |
Book questions in total Counted by status, without the app's past papers
Counted on 18 October 2026. Statuses follow the Trinity Press progress board; books, chapters and questions follow the manuscripts.
03 / How we make it
We never retype the same question for the book, the board and the app.
Questions and solutions are written once, in a structured source.
Text and solutions typeset for two-colour print.
16:9 slides for teaching, made alongside.
All 99 chapters of the nine books pass the app conversion check. The app screens are in development.
Print edition
Lesson slide
04 / Team
Founder · content and teaching
Founder of Trinity MathsLab · mathematics teacher
Owns Curriculum and question design, writing the three textbook series, planning and building the 111sm app
About the founder →CTO · publishing and technology
CTO of Trinity MathsLab · software engineer
Owns The Trinity Press repository and typesetting pipeline, textbook design, and work with the printer
05 / Contact
We can walk you through the live 111sm app and how Trinity Press builds everything from one manuscript.
Email sungmin.t@maths.study