: By using domains like duck.quackprep.com and naming pages "Flashcards" or "Classes," the site avoids common keyword filters like "game" or "arcade".
Network administrators are not villains; they are tasked with maintaining productivity. Here is why duckquackprep.com (or similar domains) gets added to the blacklist:
Schools often use broad-spectrum firewalls to prevent students from accessing distracting content. Unfortunately, these filters sometimes catch legitimate educational tools in their net.
Some basic filters only block long, specific strings. Using a URL shortener can trick the filter.