Works with your textbook

Which grammar has your textbook introduced up to a given lesson — and where does that sit on our learning-year axis? Pick the textbook, drag the slider to your lesson, and you see what has been covered.

Why we do not copy a single textbook

For is, ea, id, the imperfect and the future perfect, the textbooks contradict one another — the same grammar sits a year earlier or later depending on the book. Our axis lies between them. An app built around one textbook is wrong for every other. So we show how the two relate instead of pretending there is only one path.