These sites are typically lightweight, built on simple HTML5 code, and hosted on domains that look educational or benign. Enter DuckMath.
DuckMath and similar sites are a cat-and-mouse challenge. They exploit the fact that schools cannot block every new domain instantly.
The appeal of sites like DuckMath lies in their branding. By incorporating words like "Math," "Class," or "Learning" into the domain name or title, these sites present themselves as educational tools. This clever nomenclature often tricks basic keyword-based filters, allowing the site to slip through the net.