For teachers
29 core challenges, targeted revisits, and a 10-question independent check. First-try results are separate from completion with help. This is a classroom practice certificate, not a secure credential.
Voice is pre-generated AI narration. No student responses or names are sent to a server. Progress stays in this tab. Simplified shell pictures show counts, not electron trajectories or scale. Charge explorers are counting models, not predictions of stable ions. Trends are not universal rules. Images of materials are AI-generated illustrations reused from the regions lesson.