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Caribbean Math CoachPrototype

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Caribbean Math Coach

An independent CSEC Mathematics learning prototype. It is not affiliated with, or endorsed by, CXC. When you sign in, we store your learning activity and focused practice time to show progress and support your learning. Calculator keystrokes are not stored. Learners under 18 should use this with a parent or guardian aware.

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Worked example

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Demo

Caribbean secondary maths

Find the exact step where your maths went off track.

Photograph homework and see the first mistake.

Captured pageFirst error

Solve 3(x − 2) + 5 = 20.

First incorrect step3x − 2 + 5 = 20

Multiply everything inside the brackets

You multiplied 3 by x, but you also need to multiply 3 by −2.

3(x − 2) = 3x − 6

CSEC words to know

Distributive law: — the mathematical name for this rule.
Expand the brackets: — multiply the number outside by every item inside.

Demo estimate, not an official CXC mark

Estimated mark 1/4

See a worked example

How it works

Upload → Diagnose → Improve

1
Upload
Photograph the page. In this prototype the file stays on your device.
2
Diagnose
See the first incorrect step and the idea that slipped.
3
Improve
Practise the same structure with new numbers.

Example feedback

Start at the first slip.

Question

Solve 3(x − 2) + 5 = 20.

First error

3x − 2 + 5 = 20

You multiplied 3 by x, but you also need to multiply 3 by −2.

Correction

Multiply everything inside the brackets

3(x − 2) = 3x − 6

CSEC words to know

Distributive law: — the mathematical name for this rule.
Expand the brackets: — multiply the number outside by every item inside.
Remove the brackets: — another way the required process may be described.

Open the full worked example

Your progress

Start unassessed. Earn a starting point.

Number, Algebra, Geometry and Statistics stay unassessed until you complete a mission. Mission 1 measures expanding brackets in Algebra only.

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