The Engine and the Driver: What Ability Tests Miss
Most secondary schools run an ability test on entry: an hour of reasoning puzzles that predicts grades and flags pupils whose ability outstrips their performance. These tests do a real job. But there is a distinction every teacher should have to hand: they measure the engine, not the driver.
A powerful engine can fail every journey
Reasoning is how powerful a child's engine is. Attention and executive function are whether the driver can keep the car on the road: notice the right things, resist the wrong ones, hold the route in mind, plan the turns, finish the journey. A child can have a genuinely powerful engine and fail every journey, and an ability test will tell you only that they are underachieving. Never why. And it gives the child nothing to do next.
What the driver's skills actually are
Executive function is not one thing. Working memory is the mental notepad: how much a child can hold in mind and use at once. Inhibition is holding back the impulsive response in order to meet a goal. Planning is thinking ahead before starting. Task shifting is moving focus cleanly between demands. Add the attention systems underneath, processing speed and selective attention, and you have the machinery every lesson quietly leans on.
These skills are measurable, separately and objectively. And the profile matters more than any total: a child with strong reasoning and a full mental notepad needs completely different support from a child with the same grades whose difficulty is getting started at all.
Measure the why, then do something about it
This is the gap the Pebble Skills Check was built for. Twelve game-like tasks measure the driver's skills for every child, in one lesson, alongside the cognitive picture their teachers already hold. The Student Report explains each child's profile in plain language, strengths first, with strategies attached. And because these skills respond to structured practice, Pebble Academy then trains the areas that were flagged.
None of this replaces the tests a school already runs. It answers the question those tests keep raising and cannot answer: this child is capable, so what is getting in the way?