Talk in twos - IN ENGLISH 
Explain to your peer sitting next to you:
What you have learned / done in English lessons in your STAGE  last year. What was an eyeopener or blooper? 
A didactical eyeopener / blooper Care to share (anonymously)... 
What did you learn? I found that ... I learned that ... 
What did you teach your pupils? My pupils learned ... I taught my pupils ....