Pupils needing extra support

Could draw simple shapes or use stickers of different shapes or colours to complete the pictogram; could use a device to record a response to Marlin and play this back to the class.

Pupils working at greater depth

Should use their knowledge of food chains to predict what may have caused changes to population sizes, such as sea turtles eating litter instead of their normal food, which is why there are more jellyfish than before.