# Fish Dish

Pupils plan when they should start preparing a meal in order to have it ready by a stated time.

# Practical details

Suitability
National Curriculum levels 5 to 6
Time
30 minutes to 1 hour
Resources
Ruler, pencil and paper; scissors available but provided only on request.

# Key Processes involved

Representing
Select a way of representing the sequence of jobs using a table or diagram showing times, constraints and which jobs may be done in parallel.
Analysing
Work logically towards a result, sequencing the jobs using the constraints given on the job cards; explore the effects of varying the order.
Interpreting and evaluating
Relate findings to the original context: they look at the organisation of jobs, recognise which jobs may be done in parallel and deduce the latest time they can start preparing the meal.
Communicating and reflecting
Communicate reasoning clearly, showing the order in which jobs can be done and which may be done in parallel.

# Teacher guidance

Check that Pupils fully understand the context, for example with questions such as:

• How long does it take to boil a potato? How about frying a piece of fish?
• Would you start them both at the same time? Or which would you start first? Why?
• Show your working so that I can understand your reasoning – don’t just write down the answer!

This task requires pupils to demonstrate their proficiency in the Key Processes using fairly elementary mathematical techniques. They might be expected to:

• create and interpret graphs and diagrams and draw conclusions