The materials pack is really comprehensive and provides a whole range of different types of activities offering the learners (and the teacher) a really good variety of motivating exercises, practical tasks, or self-assessment activities.
The differentiation concept is very well thought through. Without stigmatizing any students, the 4 different levels that are added to the basic material appropriately differentiate both upwards and downwards.
The topics of the chapters are recognisably competence-oriented (grammar and orthography are separate competences themselves), but also cover a very useful selection of topics of interest and relevance to 10-year olds.