Reading a real tool correctly is its own skill, separate from the math behind it — a tape measure, a protractor, a caliper all fail you the same way if you can't actually read the marks. Start here to build tool literacy: what to reach for, how precise it actually is, and how to read it without guessing.
Read a real ruler down to the sixteenth of an inch. Learn why tick height tells you the fraction at a glance, then practice reading and placing real measurements — graded exactly, no partial credit for "close enough."
Read and place angles on a real protractor — and see the radian value sitting right behind every degree reading. Ties directly back to Calculator Explorer's π key instead of teaching π as a second, unrelated fact.
Guess tomorrow's weather, then check how close you got — thermometers and pressure readings are measurement tools same as a ruler or a caliper. Relocating here from the Guild root; badge/category reconciliation (weather-watcher, junior-meteorologist) is still an open item, not yet decided.
The flagship of this category — drag-to-length, offset measuring, the carpenter's 10-inch trick. Needs real drag interaction, not just click-to-place, so it's being built after Ruler Simulator proves the reading pattern out, not before.
Outside, inside, depth, and step measurement — the same tool reading four different features depending on which jaws you use. Digital, dial, and vernier variants planned.
Sleeve and thimble reading, with a digital readout available as a checking aid — not a replacement for learning to read the mechanical scale itself.
Three different scale mechanisms read three different ways — a pull scale (hanging/spring, like a fish scale), a push scale (compression, like a bathroom scale), and a platform/balance scale. Volume and the fluid-ounce-vs-ounce mistake are a likely follow-on, not part of this build.
hil-shell.js or
session-logger.js yet — same gap Punctuation Explorer has, and the same porting work: mechanical
at this point, not a design question. Scale Rule Simulator from the original proposal isn't on this roadmap
yet — it teaches a genuinely different skill (reading a scaled drawing, not a physical tool) and deserves its
own scoping pass rather than being assumed into this list.
weather-watcher, junior-meteorologist) stay
defined in hil-guild.html's catalog unchanged; whether they get re-categorized as Weights &
Measures badges is still an open call, deferred rather than decided. Weather Spotters is also NOT added to
WM_MODULE_IDS below — its own session-log/badge tracking is a separate, already-working system,
and folding it into this hub's progress count would be guessing at an answer to the same open badge question
rather than actually resolving it.