She does a short 'test before you teach' activity with these words:
action, accommodation, admission, permission, electrician, politician, station
to conclude that the last syllable in all the words sounds the same, / ʃən /.
Then she moves on to gives a few examples of the most common words in English with these suffixes, to end up with a short test. All her explanations come together with an audio recording.
I hope you enjoy it.