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David Tung

Turning the driest subject into lessons watched a million times.

Before building products, I taught Pascal programming to students. Lessons were designed like a product: simple, rhythmic, with feedback — and they reached over a million learners.

Role: Educator

Pascal lessons1M+ views
program Hello;
var i: integer;
begin
  for i := 1 to 3 do
    writeln('X10');
end.
  1. Intro
  2. Variables
  3. 3For loops
  4. 4Arrays
  5. 5Sorting

1M+

lesson views

Pascal

foundational technical subject

Simple

lesson design principle

X10

scaling through content

A lesson is a product, too

The principles I used to teach students are the same ones I use to design products and train teams today.

  1. Pascal track

    12'/bài
    1. Variables & types
    2. For loops
    3. 3Arrays
    4. 4Sorting algorithms

    Cut to the core

    If an idea doesn't help the learner act more clearly, it gets cut.

    Simple
  2. Quick exercise

    Which loop runs exactly n times?

    • for i := 1 to n do
    • while i < n
    • repeat … until
    Correct! +10 pts · 5-day streak

    Pace and feedback

    Each lesson has a small goal, an immediate exercise, and fast feedback to keep momentum.

    Rhythm
  3. Cumulative views

    1,000,000+

    A great lesson runs for you ×1M

    Scale through content

    A great lesson runs for you a million times — that's the first lever.

    Scale
Pascal to 1M learners

Lessons carried into today

Teaching is the fastest way to understand deeply. Every framework I write must be teachable — if it can't be taught, it isn't simple enough yet.

Talk it through
Leadership coaching
Running

Leadership coaching

Turn complex management frameworks into clear steps for CEOs.

Product onboarding
Running

Product onboarding

Design learning experiences inside SaaS products.

Playbooks
Running

Playbooks

Write short, sourced manuals teams can use immediately.

Deployment stories

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SaaS Platform

Simplamo Management OS

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A management operating system for boards and executives to align OGSM/BSC/KPI/OKRs, dashboards, meeting rhythm, and AI.

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customers / users

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AI Agent

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An AI Agent for a 2,000-dealer network, enabling image-based consultation, quotes, and orders in under 60 seconds.

2,000

C1/C2 dealers on one consulting standard

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IoT Platform

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Founder / Architect

An industrial monitoring platform with 1,000+ stations serving FDI factories and public agencies.

1,000+

automated monitoring stations

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Resources

Get started with these resources

Playbooks and execution notes to bring the same approach to your team.

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