Domain Arrivals
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Featured in Domain Arrivals · 2026-08-15

Lead II Teaches EKGs With Calipers, Not Flashcards

lead-ii.com ↗ · Learning & Exams · score 86.0
○Open: public page gives enough substance to understand the site $Paid: pricing, booking, ecommerce, subscription, or paid access is visible ADAds: visible ad load or ad-supported content ✦Pretty: notable design, copy, craft, or presentation ◆Pro: polished, finished-feeling, serious, or operationally mature ◇Niche: specific audience, workflow, or unusually focused use case ◉Human: personal, local, community, civic, handmade, or real-person signal !Suspicious: scammy, spammy, trust theater, finance fog, or credibility concern

An interactive EKG course that trains learners to read rhythms by measuring intervals instead of matching familiar-looking pictures.

Why it surfaced

Its central control is wonderfully concrete: drag calipers across generated tracings and get exact feedback on R–R, PR, QRS, and QT intervals. The course extends that method through eight modules, including randomized drills, axis manipulation, and modeled twelve-lead cases.

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The Two-Tonne Temperature Problem

August 15’s newborn domains include a live-aboard hydrogen airship with a two-tonne lift problem, a Japanese toolbox that explains its assumptions, an advisory-by-advisory Hawaiʻi hurricane archive, and a wedding-gift game about ungrateful poultry.

This is one of 1,000 discoveries in the 2026-08-15 Domain Arrivals issue.

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 BookPass: A Taiwanese Bookkeeping Exam Archive gobookpass.com

A free study site collecting 1,181 questions from ten years of Taiwan’s national bookkeeping exam, with official answers and AI-written explanations.