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Addestra
Maths & adaptive practiceUnited States

IXL Learning

Adaptive practice and diagnostics across subjects

The Four Mismatches · IXL Learning

Built for another system

Assessed for a Commonwealth / Global-South student (as an import).

  • CurriculumFail

    Aligned to US Common Core and state standards; strong on practice, but not to local exam boards.

  • LanguageFail

    English and Spanish only.

  • PricePartial

    A family subscription exists, but priced in US dollars for the US market.

  • InfrastructurePartial

    Browser-based; assumes a device and connection.

An endlessly-deep practice platform — for the US curriculum. Product-export for a Commonwealth exam.

addestra.com · The Four Mismatches Test. A single fail means it was built for a different system.

Independence: Addestra builds learning products too (MathsTutor, TinkerWell). We never review or score our own, and no tool pays to be listed or to rank higher — how we assess fit.

What it does

What the AI actually does — A 'SmartScore' adaptive proficiency engine (0–100 per skill, moving on difficulty and consistency, not % correct) plus a real-time diagnostic.

Why it was built — Give every K-12 subject one comprehensive, endlessly adaptive practice platform so each student works at their just-right level.

Who built it

Company
IXL Learning, Inc.
Founders
Paul Mishkin
HQ / origin
San Mateo, California, USA
Founded
1998
Model
B2C / B2G
Exam systems
US Common Core · US state standards
Languages
English · Spanish
Pricing
Family subscription + school/district licences

We record durable facts only — no funding-raised or user-count figures. Unverified fields are marked [TBD] rather than guessed.

The fit assessment

The scorecard above scores IXL Learning on the four axes on which exported EdTech fails to fit a local system — assessed for a Commonwealth / Global-South student (as an import). The verdict: An endlessly-deep practice platform — for the US curriculum. Product-export for a Commonwealth exam. For the full framework, see the Four Mismatches Test.

Where it sits

IXL Learning is on the EdTech AI 100 map, in maths & adaptive practice, built in United States.

Related & alternatives

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