# ELI5, Test Yourself, and the Rule-Out Button

> What ELI5 is, how 2,849 ELI5s now follow each First Aid page in reading order with topic tabs, 649 new ELI5s and 398 new Test Yourself MCQs, and the new Rule out button that teaches elimination.

URL: https://vault-guides.vercel.app/eli5-test-yourself.html
Canonical: https://usmlevault.com/blog/eli5-test-yourself.html

## Summary

Explains the First Aid Guide's two teaching layers. ELI5s are plain-English explanations for each heading on a First Aid page — 2,849 across 16 systems, now in the page's own reading order, with topic tabs named after the page's headings (tap a tab to open every ELI5 for that topic). Each ELI5 runs: The big idea, The story, Now bridge to USMLE, On the exam, The trap the exam sets, Key terms, Abbreviations. 649 new ELI5s and 398 new Test Yourself MCQs were added. Test Yourself MCQs now have a 'Rule out' button that strikes an option through, to practise elimination, and 'Show all questions'. Ties ELI5 to the tutor and elimination to Mehlman.

## Key facts

- ELI5 = a plain-English explanation of a First Aid heading, story first, then bridged to the exam
- 2,849 ELI5s across all 16 systems, now in each page's reading order
- Topic tabs named after the page's headings; tapping a tab opens every ELI5 for that topic (1,491 ELI5s grouped under tabs)
- Each ELI5: The big idea · The story · Now bridge to USMLE · On the exam · The trap the exam sets · Key terms · Abbreviations
- New content: 649 ELI5s and 398 Test Yourself MCQs added
- 'Rule out' on every MCQ option strikes it through, UWorld-style; not saved or scored
- 'Show all questions' / 'Collapse all' on pages with 2+ topics