After a successful trial of worked examples towards the end of last academic year I have focussed on using it with all my classes since September.
My main focus has been writing good self -explanation prompts.
My self explanation prompts often contain stems such as:
Below are some pictures of the student handouts.
It's not an exact science and sometimes the worked example needs explaining line by line to the class - but the students are getting better and knowing what to expect.