Besides e-books, Schooltas also has a personal notebook. You can find it on the right edge of your screen by clicking the arrow:
Tap or click the "+" sign to add a new note.
You can add tags to indicate what the note is about. You can also add hyperlinks and images to your notes. If you add a YouTube link, Schooltas will automatically embed the video.
Click "save" to save the note when you're done.
You can use the search function to search through all your notes and tags.