Numeracy - Written problems, times tables or written problems as these are always useful and taught fairly uniformly. Get them to make up their own word problems from given 'maths sentences' eg 15 x 4 =
I had to pay £15 each for my 3 friends and I to go ice skating. How much did I pay?
They love making them up and you can gradually assess ability and increas difficulty. Good practice for low ability to look at words - share, less, more, add etc.
Literacy - Poetry can always be taught in isolation but frankly I dont like poetry that much. In this situation I would probably do scene setting or persuasive texts. Scene setting - read them a setting description and ask them to draw as you read. How did you draw it? What helped you imagine it? You develop their language and then get them to write their own base on some pictures you bring along for inspiration.
Persuasion: persuade me to visit your local town/city/the seaside for a holiday.
In general: Thinking skills and debating - give them a problem (should children be arrested and sent to jail, are there jobs women/men shouldnt do, when are you old enough to drive etc), get them to discuss in pairs, then groups then whole class. Ask them to write their arguments down, structure counter arguments, research some 'proof' for their argument.
I have never walked into a classroom and found zero plans. Is it a 1 form entry school? If not there will be another teacher to help you. It is simply not acceptable for them to leave nothing, if they do ask senior management to give you some sort of idea of what to teach. Dont forget you'll have a TA as well.
Good luck. Year 5 are great.