Once you assume responsibility for a subject area, there will be an opportunity for you to shape it to include character education opportunities. This can be applied to all subject areas.
historical figures
You might discuss notable historical figures that have shown positive character traits.
debate
Encouraging discussion and debate about themes arising from the subject/topic being discussed.
ethics
Adding in activities that allow for the practice of solving ethical dilemmas. An example of this may be in computing:
How was Alan Turing treated for his sexuality, despite the efforts he made to help during WWII?
extra-curricular
Creating after school clubs that allow students to experience things outside of the taught curriculum.