Mr. Duarte loved the hum of a good science lesson; he hated moderating. The day the class stepped into a volcanic twin, he braced for trouble – and got none. When a shout rose, it was delight: “We found the lava tube!” The chat stayed kind without him hovering.
Schools want immersive learning without unsafe chats, attention traps or accidental data trails. Teachers need tools, not more tabs.
How it Works: The twin runs in a browser on classroom devices. HAL8122™ enforces age‑appropriate settings, filters UGC before it appears, and highlights duty‑of‑care risks privately to staff. Sessions are time‑boxed; attention breaks are built‑in. Usernames default to first‑name initials; cameras default off unless pedagogically required. Parents receive plain‑language notices; students can review and delete their own artefacts.
Why it Matters: Teachers teach; moderators moderate – invisibly and safely. Students remember volcanoes, not drama. The class leaves the twin calmer than they entered it, and Mr. Duarte’s Sunday belongs to his family again.
EU‑by‑Design: Strict GDPR minimisation for minors, role‑segregated controls, EN 301 549 accessibility, and moderation workflows aligned to the Digital Services Act. Consent is specific; logs are short; safety is proactive.