KeySlice teaches typing from the keys you actually miss

Field notes

The lesson path introduces two keys at a time, starting with the tactile-bump keys J and F rather than presenting an entire keyboard row. Practice data is reduced to per-key correctness and inter-keystroke timing, allowing later drills to weight keys that are inaccurate or merely slow. The page also includes separate typing material for Python, C++, and HTML, suggesting an attempt to carry the method beyond ordinary prose.