# Goal: Complex matter

    If you want to re-use this chapter, feel free to copy this url:
    https://maken.wikiwijs.nl/177307/Goal__Complex_matter

There are subjects that many students have difficulty with: the so-called 'stumbling subjects'. Knowledge clips can provide welcome support for students in that case.

For example, Theo de Haan has made short instructional videos on a variety of mathematical subjects.

Below an example (in Dutch).