Learn
Practice vocabulary, visualize algorithms, explore concepts — learn by doing, right in your browser.
All Learn
Bopomofo Practice
Trace all 37 Bopomofo (Zhuyin) symbols (ㄅ ㄆ ㄇ…) in Taiwan's official MOE stroke order, with animation, live grading and a pronounce button — for early learners and students of Chinese.
Chengyu Guess
A daily four-character Chinese idiom guessing game with a multi-layer hint system. Six tries to crack the hidden idiom.
Scale Sense
Translate any big number into real-world equivalents — 245 hand-picked anchors from every continent, from the speed of light to a bubble-tea cup, so abstract magnitudes finally feel like something.
Stroke Order Practice
Trace common Chinese characters in Taiwan-standard stroke order — every character verified against CNS11643 official data, with live grading and stroke animations.
Sundial Simulator
An interactive sundial for understanding solar geometry — adjust latitude and date to watch shadows move.