Mechanism-first practice across 16 systems. Every explanation leads with the Master Pivot. Pick how you want to run it.
Pick up where you left off
Block 1, question 5
⛶ Exam Mode · full-screen lockdown
Locks into full-screen, blocks right-click, copy, and text selection, and logs tab-switches as focus breaks counted on your review. Auto-on in Timed Mode.
Choose a Block
Esc exits full-screen but pauses the clock.
I. Block 1 of 830:00
⛶ Exam Mode
1 of 20 ·
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Focus break detected
You left the exam.
The clock kept running. Try to stay in the tab. This is what test day will feel like.
0%
0 / 0 correct
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DIFFICULTY-WEIGHTED SCORE · estimate · not an official NBME / 3-digit score