Expressions such as ”when it comes to” are useful for giving the reader a preview of what the author will focus on in this part of the text. This strategy thus makes it clear to the reader which part of your argument is discussed here. There are several expressions that are used for this purpose; other common ones include ”with regard to” and ”with respect to”.

When it comes to classroom education, there is limited instructional time.

With regard to the associations between children’s phthalate metabolites and children’s behavior problems […], only one significant association was implicated.