Four different subjects wearing one name
“English” on a timetable covers at least four separable skills, and a child can be strong at one and weak at another.
Strong here, weak there
A voracious reader may still write shapeless essays. Flawless grammar can sit beside no idea what a poem implies, and a confident speaker can fall apart in written comprehension.
Each skill tested on its own
The trial assessment tests reading, writing, comprehension and speaking separately.
Effort where the grade is lost
The term plan targets whichever skill is actually holding the grade down, rather than spreading effort evenly across everything.