Works like a magazine. Turn the pages by clicking right corners, turn back using left corners. Somewhat unusually, the pages respond to the height of the window rather than the usual width.
For optimum viewing, make sure your browser window is maximised vertically. Any other viewing problems can usually be sorted using the Zoom options below.
Though there is no Formula Writing until N4, we want our pupils to start writing Formulae in S3. Book 2 is posted on the N5 page.