This task is about capacity of different containers.
Task administration:
Equipment
200 millilitre container (labelled A); 700 millilitre container (labelled B); one litre measuring jug with numbered markings at 100 ml interval; access to water.
This task is completed with pencil and paper, and other equipment.
For the estimation part of this task let each student look at the containers.
For the measurement part, let each student fill the containers with water at the sink.
It may be easier to cut down larger containers, e.g., a one litre milk bottle, rather than find containers that exactly measure the specified capacities.