Posan High School · Mathematics Teacher

Jae-hyuk Choi

Math teacher · Maker

I have taught mathematics at middle and high schools in Daegu since 2012. What began as GeoGebra-based lessons grew into Python and AI mathematics, and today I solve classroom and school-office problems by building web services myself. What I learn, I pass on through teacher training and student lectures.

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Jae-hyuk Choi

By the numbers

Years in teaching (incl. current)
0
Lectures & trainings
Many
Books (co-authored)
0
Services in production
0
Commendations & awards
0

The road so far

  1. Mar 2012 – Feb 2014

    Teacher, Siji Middle School

    Gifted-class mathematics

  2. 2013 – 2015

    Instructor, Gifted Education Center, Daegu Dongbu Office of Education

  3. Mar 2014 – Feb 2019

    Teacher, Daegu Seobu High School

    Department head, 2018

  4. Mar 2019 – Feb 2025

    Teacher, Daegu Science High School (gifted school)

    Head of curriculum · launched and taught the "Artificial Intelligence" course (2022–2024)

  5. Mar 2025 – Feb 2026

    Seconded teacher, Kyungpook National University

    IBEC programme

  6. Mar 2026 – present

    Teacher, Posan High School

    IB Math AA · AI Mathematics joint curriculum

Research groups & roles

  1. 2014 – 2018

    Member, Technology Tools Team, Daegu Secondary Mathematics Research Society

  2. 2021

    Programme developer, 13th Daegu Math Festival

    Marble-run contest built with Desmos

  3. 2021

    Chair, Pasukkun research group (math teachers using Python)

    Daegu curriculum development teacher research groups

  4. 2021 – 2023

    Participating teacher, AI-powered Math Jumping School

    Khan Academy · teacher–student mentoring

  5. 2022

    Chair, AI Mathematics Curriculum Development Teacher Research Group

    Daegu curriculum development teacher research groups

  6. 2022

    Led the AI Convergence Education pilot class

    Grade 10 mathematics, earth science and informatics; drones and image classification

  7. 2022

    Student Activities team lead, 14th Daegu Math Festival

  8. 2022 – 2024

    Ran the Math Sharing School programme

    Daegu Metropolitan Office of Education

  9. 2024

    Operations team lead, 16th Daegu Math Festival

  10. 2025

    Member, KTCS Vibe-Coding research group

  11. 2026

    Chair, Mathematics Immersion Camp research group

  12. 2026

    Consultant, Daegu AI Mathematics Education Support Group

  13. 2026

    Instructor, gifted class, DGIST Convergence Education Institute

What I do

01

Teaching mathematics

Technology lets every student move at their own pace.

  • •IB Math AA · Calculus · AI Mathematics
  • •Differentiated lessons with GeoGebra, Desmos and Python
  • •R&E and statistics-competition coaching

02

AI convergence training

I pass on what I learn in a form teachers and students can use right away.

  • •AIEDAP Master Teacher · instructor for promotion and induction courses
  • •Instructor, Classroom Revolution Leading Teacher training
  • •20 school-visit consulting sessions

03

Building education services

Problems I meet at school become web services I run myself.

  • •Teacher planner · lesson platform · meals · attendance apps
  • •Shipped on Next.js, Rails and Railway
  • •Vibe-coding with students

Things I built

  • ChoisNote mockup

    ChoisNote

    Smart planner and collaboration platform for teachers

    Schedules, classes, counselling, AI-assisted student records, Google sync. Available as a PWA and an Android app.

    • Rails 8
    • Hotwire
    • Tailwind
    • PostgreSQL
    • Railway
    Site ↗▶ Video
  • ChoisClass mockup

    ChoisClass

    Tablet handwriting platform for math lessons

    Live shared handwriting and interactive HTML tool pages.

    • React
    • Fastify
    • Socket.IO
    • Excalidraw
    Site ↗Teachers and students only
  • PosanMeal mockup

    PosanMeal

    School meal sign-up and check-in app

    • Next.js
    • Prisma
    • Railway
    Site ↗▶ VideoSchool members only
  • Self-study Attendance mockup

    Self-study Attendance

    Attendance management for afternoon and evening self-study

    • Next.js
    • Prisma
    • Railway
    Site ↗▶ VideoSchool members only
  • MathCoach mockup

    MathCoach

    Multi-perspective AI coaching for math solutions

    Students write a solution by hand; algebra, geometry and proof coaches each give feedback from a different angle.

    • Next.js
    • Prisma
    • Gemini
    Site ↗

Books

Items & materials

  • 2017 – 2018EBS-linked item development team, Daegu Metropolitan Office of Education
  • Nov 2017Item writer, Daegu mock examination (Mathematics)
  • 2024Field review panel, AI Digital Textbook for High School Mathematics 1

Lectures & trainings

WhenWhatWhere
2023 – presentInstructor, AIEDAP Master Teacher trainingPromotion, induction and general-teacher courses; regional showcase (SNU Siheung, Osong, Gyeongju)
2024 – 2025Lead instructor, Classroom Revolution Leading Teacher trainingKERIS · Yeongnam region
2025 – 2026Lead instructor and coordinator, School Visit ConsultingDigital literacy · data-driven field research · curriculum evaluation and feedbackGeumo High, Haemaru Middle, Gumi Indeok Middle and others — about 20 sessions
2025 – presentInstructor, education-office in-service courses for math teachersDaegu Education Training Institute and others
2022 – presentInvited instructor for school and research-society teacher trainingsAI convergence education · generative AI · Apps Script · AI digital textbooks · student recordsDozens of schools and societies across Daegu and Gyeongbuk
2024 – 2025University workshop and graduate-school case presentationsKNU AIEDAP project workshop, Graduate School of AI Convergence Education

Contact & links

Emailcomplete860127@gmail.comGitHubChoisMath ↗Live sitesChoisNote ↗Live sitesChoisClass ↗