High school maths tutoring by video

Maths is the subject where video lessons stopped being a compromise. A shared whiteboard holds a full derivation without anyone running out of paper, the tutor sees each line as it is written rather than a photographed answer, and the whole session can be saved and reopened the night before a test. Geography stops mattering too: a student in a small town gets the same choice of tutors as one in the capital, and a family abroad can keep a teacher who knows the syllabus back home. The work itself is unchanged, quadratics through functions, trigonometry, derivatives and integrals, with revision blocks before mocks and entrance exams. Evening slots go first once term starts, and a free first lesson costs nothing but the hour.