IXL review: relentless practice that works, if you can live with SmartScore

IXL is the most comprehensive practice platform in school education, and one of the most divisive. Ask a head of maths and you will hear about the analytics. Ask a parent and you will hear about SmartScore. Both are right, and the gap between them is the whole review.

We used it for two terms with a mixed-ability Year 7 maths set of twenty-nine, and followed two families using family subscriptions at home with children aged eight and thirteen.

The scale is the point

IXL's skill library is enormous. Maths runs from counting objects in pre-K to calculus, English language alongside it, plus science, social studies and Spanish. Each skill is narrow enough to be useful — not "fractions" but "add fractions with unlike denominators using models" — and each generates fresh questions rather than serving a fixed set, so a child cannot simply memorise their way through.

For a teacher, that granularity is the product. When a class assessment shows a wobble, you can find the four skills that actually address it and set exactly those, rather than assigning a chapter and hoping.

The Diagnostic is the best reason to buy it

IXL's adaptive Diagnostic asks a stream of questions across strands and returns a working level for each one — number sense, algebra, geometry, measurement, data — instead of a single grade. Run it in the first week of term and you get a map of a class that would otherwise take a month of teaching to build.

In our Year 7 set it flagged two children whose arithmetic was two years behind their algebra, which is not a pattern our own baseline test had picked up at all. That single insight changed how we grouped the class for a term.

SmartScore, and why it makes people angry

Every skill has a SmartScore out of 100. Correct answers raise it, wrong answers lower it, and the penalty grows as the score rises. The intent is defensible: it stops a child limping to "mastery" on a coin-flip success rate, and it rewards sustained accuracy rather than volume.

The lived experience is different. A child at 94 who makes two careless mistakes because they are tired can drop into the seventies and lose the sense that the last half hour counted for anything. Both families we followed described the same scene, and both had at some point sat next to a crying child. This is not an edge case — it is the most consistent piece of feedback about IXL anywhere, and IXL has not meaningfully changed it.

Teaching versus testing

Every skill has a "Learn with an example" panel and, for most, a short video. They are clear and mathematically sound. But they sit behind the question, framed as help once you are stuck, and children under about ten rarely go looking for them unprompted.

That makes IXL excellent practice and mediocre instruction. In a school where a teacher has already taught the method, it is close to ideal. At home, where a parent is often the only explanation available, it can turn into forty minutes of a child guessing and an adult improvising a lesson on adding unlike denominators.

The analytics

This is where IXL is genuinely without equal. You can see, per child and per skill, how long they spent, how many questions they answered, where the accuracy fell away, and which specific question types keep going wrong. Trouble Spots surfaces exactly what to reteach.

It is also, in fairness, a lot of data. Teachers new to it should pick two reports and ignore the rest for the first half-term.

What we would use instead

• For fluency at primary level with far less friction, a dedicated mental maths tool is kinder and cheaper.
• For instruction first and practice second, a video-led platform with structured courses fits home learning better.
• For exam-board specific revision at GCSE and A-level, a question bank aligned to the specification will beat a general skills library.

None of those replace IXL's breadth or its Diagnostic. If you need one practice engine across a whole school, it remains the strongest option — as long as somebody has a conversation with staff and parents about SmartScore before it lands.