A teacher uses Half-Life: Alyx to provide an online lesson to his students, utilizing the in-game marker feature to discuss angle vocabulary.

Charles Coomber of San Diego yesterday took an innovative approach to teaching his 7th grade class geometry while in quarantine: conduct the whole lesson from inside Half-Life: Alyx.

Charles Coomber, a Multiple-Subjects teacher from San Diego has taken to YouTube to deliver a lesson about Angle Vocabulary using in-game marker pens and planks of wood.