Hi! My name is Chua Kah Hean. I used to teach physics at Hwa Chong Institution. Students call me Mr Chua.

I “retired” from HCI on 4th July 2022.

No I have not joined the private tuition industry (why haven’t I? why?)

Over the years, I have wasted spent god knows how many thousands of hours creating resources for students preparing for the GCE A-level (pre-university) Physics examinations. For free on the internet. When private tuition pays >>$100 per hour. (why am I so stupid? why?)

I do love $$$. But I also feel very strongly that every student, whether from rich or poor families, should have equal access to the best learning resources. So, even in my “retirement”, I hope to continue to create resources on xmphysics.com.

But I can’t be doing it for free now. I need an income stream! So if you think what I’m doing is meaningful and my effort should be rewarded, pls support me by giving me $$$.

If you’re singaporean, you can paynow/paylah me!

If you’re my international audience, you can paypal me. (Paypal takes a minimum $3 cut though)

Or if you prefer, you can be my patreon.

THANK YOU VERY MUCH!!!

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xmLecture | xmTutor | xmDemo | xmFlashCard | xmTYS | xmComic | yayaPhysics

xmLecture

xmLecture brings together all the xmphysics resources. Click here to access.

01 Measurement | 02 Kinematics| 03 Dynamics | 04 Forces | 05 Work Energy Power | 06 Circular Motion | …

The idea is to deliver xmphysics lectures in pdf documents, packed with clear explanations, supported by clickable links to awesome physics demonstrations and animations.

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xmTutor

In 2017 I started making whiteboard-style short videos to explain specific concepts. URLs to youtube playlists are provided below. (URL)

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xmDemo

I also have a blog and youTube channel running physics demonstrations illustrating A-level Physics concepts. The videos are hosted on youTube (youtube.com/xmdemo), and the blog (xmdemo.wordpress.com) provides brief explanations about the videos.

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xmFlashCard

My most improbable project. I created an android app that puts flash cards into students’ handphones.

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xmTYS

Practice with the Ten-Year-Series is a must for students preparing for the A-level examinations.

I maintain a blog at xmTYS.wordpress.com to provide worked solutions. While hardcopy TYS are arranged either by years or topics, my online version is searchable by years, topics and even concepts. This allows students to quickly retrieve questions of similar types testing the same concept.

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xmComic

During the 2015 Dec holidays, I started dabbling in comics depicting physics concepts. I have published them as blogs on xmcomic.wordpress.com.

In the comics, the physics are very loosely applied so I can foresee many “education experts” accusing me of planting wrong physics in students’ minds. Duh.

I can’t really draw so most of the time I copy from other drawings (some of the characters I drew are clearly characters borrowed from Lat, a malaysian cartoonist). I managed to force my daughter to draw a few for me. She draws very well but she is not very enthusiastic about the assignment. Sigh.

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yayaPhysics

Some time in 2013, I made a series of videos with the format of me chatting with Yaya, my 9-year-old daughter over some A-level physics concepts. It was my first attempt at making physics-related videos, so many of them were quite rough and unpolished. But some of them are quite memorable and have sentimental values for me. (URL)