Lynda Badmus

Mathematics curriculum · Assessment · EdTech product

I teach mathematics, and I build the tools I teach with.

I have spent 12 years teaching and leading mathematics in UK and US schools, through A level and the IB Diploma. When a tool my students needed did not exist, I built it: a virtual IB classroom with auto-marked homework and mastery tracking, and published chapter packs that other IB teachers can pick up and teach.

  • MEd Mathematics Education · University of Cambridge
  • GCSE Mathematics examiner · Pearson Edexcel
  • 12 years teaching and leading mathematics · UK and US
Portrait of Lynda Badmus
12+years teaching and leading mathematics
2,000+students taught, GCSE to IB Diploma
22teachers in the largest department I have trained
1,000+downloads of my published IB resources

Selected work

Each piece started as a problem in my own classroom. I designed it, built it and use it with real classes.

01

IB Math Hub

Web app · private virtual classroom for IB Mathematics

The problem
IB students juggle notes, practice, grades and a 20-mark Internal Assessment across scattered tools. Teachers cannot see where each student is stuck until a deadline has passed.
What I built
One signed-in classroom for my Analysis and Approaches SL and HL classes. Students join with a class code and get their own day plan, notebook, practice, progress view and gradebook.
Key features
  • IA Studio: the Internal Assessment as 15 stages in four phases, from finding a focus to final submission
  • Teacher feedback and approval at each stage, with a submission history
  • Practice with hints, worked solutions and exam-style drills
  • Auto-marked exit tickets, homework and quizzes, checked against known misconceptions
  • Mastery tracked skill by skill for every student
  • Built-in calculator and IB formula booklet
  • Class calendar and source log for references
  • Teacher side: marking queue, gradebook, automatic reminders and a data cycle view
  • Personalised quizzes, an assessment studio and CSV export of marks
Status
Live and used by my IB classes, and improved continuously from what I see in lessons.
Result
In the November 2026 data cycle, all 99 of my IB students were on track for a grade 4 or above, against a department target of 60%. These are internal predicted grades from marked tests, quizzes and exit tickets. The same view breaks results down by exam paper and by IB command term, which tells me what to reteach.
JavaScriptSupabaseVercelGitHubAI-assisted development
Animated walkthrough of the IB Math Hub demo, student side then teacher side
Walkthrough · student side, then teacher side
Student home page with next lesson, reminders, to-do list and feedback
Student · My day
Student practice page with exam skills and recommended topics
Student · practice, recommended by skill
Student IA Studio with 7 of 15 stages complete and teacher feedback
Student · IA Studio
Teacher marking queue with auto-marked work ready to release
Teacher · marking queue
Teacher mastery grid showing each student against each skill
Teacher · mastery, skill by skill
Teacher gradebook with class filters and CSV export
Teacher · gradebook

Every class, student and piece of work shown is invented. No real student data appears.

02

Lesson deck and printables pipeline

Content system · Python · IB and Math 3

The problem
Writing a full lesson deck, a matching worksheet and an answer key by hand takes hours per lesson, and the three drift out of step.
What I built
A set of Python tools that produce a complete lesson from one source: the slide deck, the figures, the printed Do Now pack and a separate teacher answer key, all in one consistent design.
Key features
  • Worked solutions set out line under line, as written on the board
  • A working countdown timer on every slide
  • Scaffolded and honors extension questions per lesson
  • Quizzes exported to Canvas in QTI format
  • Editable Word and print-ready PDF outputs
  • Shared with my course team for every class
Pythonpython-docxmatplotlibCanvas QTI
Do Now slide with four questions and an extension
Do Now · four questions and an extension
Do Now solutions slide with worked answers
Solutions · on the next slide
03

Miss Bee Maths: IB chapter packs

Published curriculum · IB DP Analysis and Approaches SL · TES shop

The problem
IB teachers spend evenings assembling a chapter from scattered slides, borrowed questions and no markscheme.
What I built
Complete, ready-to-teach chapter packs published under my own brand. Every question is original and written in IB exam style, so a teacher can teach, practise and assess a whole chapter from one download.
In each pack
  • A full lesson deck, over 100 slides, with every step on click
  • Do Now, teach-ins, worked examples and plenary for each lesson
  • Exam-style exit tickets with markschemes
  • A practice booklet with a full answer key
  • A 60-mark unit test with a method, accuracy and reasoning markscheme
  • A scheme of work for the whole chapter
Scale
The whole course is published: 13 chapters, 60 lessons and 13 unit tests, from Sequences and Series to Calculus and Kinematics.
Reception
Over 1,000 downloads and 3,000 views on TES, with a 5.0 average rating from 7 reviews.
Curriculum designAssessment writingIB DPPython document tooling
Cover for the Chapter 1 pack, Sequences and Series
Chapter 1 · Sequences and Series
Cover for the Chapter 5 pack, Differentiation
Chapter 5 · Differentiation
A page from the Chapter 5 unit test
Unit test · original IB-style questions
The matching markscheme page with worked answers
Markscheme · worked answers and marks
04

Assessment design and data

Assessment · analytics

Assessment
IB-style unit tests, midterms and finals written to IB command terms with full markschemes, plus a student guide to the Internal Assessment. Informed by marking GCSE Mathematics for Pearson Edexcel.
Data
A Student Performance Analytics Dashboard built with SQL and Chart.js, and IB data cycles that compare results with grade descriptors to decide what gets retaught. I train colleagues to run the cycle themselves.
SQLChart.jsTableauPower BIMastery Connect
IB-style exit ticket question worth seven marks
IB-style question · Paper 1, no calculator
Markscheme with method and accuracy marks
Markscheme · method and accuracy marks

What colleagues and students tell me

Feedback I have received on the Hub and my resources.

“Wow, Lynda! Students have been coming to see me to say how much they’re enjoying IB with the interactive resources you’ve created. They find them very visual and helpful.”

Mr Le · teaching colleague

“These are fantastic resources—visually appealing, easy to use and clearly structured to break down challenging maths concepts into manageable steps.”

Miss Hanson · IB teacher, on my TES resources

From teachers

Colleagues tell me they have not taught mathematics this way before. They point to how accessible and visual the materials are, and how much they help in breaking down the curriculum.

They also describe a lighter workload. Quick questions are marked automatically. A student who needs a retake is given one without the teacher writing a new assessment. Routine tasks run on their own, so teachers spend their marking time on the work that needs their judgement.

From students

Students tell me the instant feedback matters most. They see a misconception as soon as they make it and can fix it straight away. Before, they waited for marked work to come back, which on an A day and B day timetable could take a week.

They can then try a similar practice question on the spot. Many describe feeling more independent and more in control of their own learning, and some have told other teachers that they understand the IB curriculum better.

How I work

The same loop every time, whether the output is a lesson, an exam or an app.

Start from the learner

I teach the classes I build for. I see within a day whether something works, and I change it that week.

Build with AI, check like an examiner

I use AI coding tools to move from idea to working product quickly. Every question, answer and markscheme still gets checked for mathematical accuracy.

Write to the standard

Content is aligned to the syllabus it serves: IB DP and MYP, A level and GCSE, and North Carolina Math 3.

Make it usable by a team

I have trained departments of up to 22 teachers. What I build ships with the guidance colleagues need to use it without me.

Experience

Ten years in UK secondary schools, including six leading the mathematics department, then leading IB mathematics in the United States.

Lead IB Mathematics TeacherBallantyne Ridge High School, Charlotte, NC

IB Mathematics Lead Teacher & Data LeadBritish International School of Charlotte (Nord Anglia Education)

Mathematics Teacher and Curriculum & Assessment LeadThe Sydney Russell School, London

GCSE Mathematics ExaminerPearson Edexcel

Mathematics Teacher and Intervention & STEM LeadThe Petchey Academy, London

Mathematics TeacherCowplain Community Secondary School, Waterlooville

MEd Mathematics Education, University of CambridgePGCE, University of Sussex · BEng Chemical Engineering, Aston University