Output in Android Chrome where you see classroom not visible in timetable, but I see it with my PC. Portrait and landscape views have the same problem.
Fig. 1 Landscape view
Phone: Oneplus 2.
OS: OxygenOS 3.1.
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Options inherent to Chrome
Menu (upper right corner) → Settings →Accessibility option → Text Scaling
Of course, you may need to resize the text for other sites of text is too small for comfort