An mdexam file is a plain markdown document, which allows you to easily create exams with inbuilt answer checking. Interactive question widgets are placed with blocks that sit exactly where the input element should appear, so a question can be anywhere you want.
A minimal complete exam:
---
title: Warm-up Quiz
---
# Derivatives
Compute $\frac{d}{dx} x^3 =$ ::input math 3*x^2::{points=2}
::solution
Power rule: bring down the exponent, $3x^{3-1} = 3x^2$.
::Please refer to Format.md for documentation of the features.