Intermediate Listening and Speaking students writing a dictation:
"On Friday night they go dancing, and on Sunday they go ice skiing."
and another one: "On Friday night they go dancing, and on Sunday they go ice hiking." hmmm... don't know which one is more exciting?!

Advanced reading and writing student writing an essay about the negative effects computers may have on youngsters:
"According to the data of investigation (!), the computer radiation can damage to the child intake of brain." o_O
I wonder what's the amount of brain a child should "intake" daily? :))