I've chose to to Simple Past as I have to work round a grammar point... basically going to introduce the context through a conversation text, then have them read it for meaning then recognition (thought give them a task for them to practice changing the from positive to negative to question just to make sure they know it)... after that do form... the drill pronunciation.
After that I'm going to give them a partner task which is a gap fill where they have to ask questions to get answers. This will be followed by semi-controlled task of asking each other questions. Then a freer where they make up their own role play around the whole "my weekend".... going to do cold error correction after each oral activity.... hopefully with the feedback and report back included it should make 90 mins!
I have never met the intermediate class! and I have a feeling they are only wanting to watch the grammar part... and then go by the lesson plan for the rest!