Reach for the Star

Collect expand and factorise

Pearson Edexcel GCSE Mathematics 1MA1 · Foundation and Higher · L018 · Review v0.9

Your learning journey

Collect like terms, expand a single bracket and factorise a common factor. Explain how these equivalent forms are connected.

Work without a calculator except for an invited check. Keyboard - means the same as −. Attempt before opening a scaffold or intentional practice explanation.

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Ready.

Connect & Check

Like terms: identical variable part including powers. Expand: multiply out a bracket. Factorise: express as a product. Common factor: divides every term. Equivalent: same value for all allowed inputs.

Intentional practice feedback after your attempt

20.

12+8.

Intentional practice feedback after your attempt

6.

Largest shared positive factor.

Intentional practice feedback after your attempt

6.

Product of two negatives is positive.

Share

In pairs, predict the first step and compare your reasons before reading the worked solution: D1 Model: 3x+2x−x=4x. Now simplify 5a−2a+4.

Present

The distributive law a(b+c)=ab+ac shares multiplication across a sum. Thus 3(x+2)=3x+6. Reversing this gives factorisation. Collecting 3x+2x counts five x units; x and x² are different units.

Group only like terms. Multiply every term inside a bracket, including its sign. To factorise, take a common factor from every term. Expand again and substitute a value to check.

Optional scaffold

Count the coefficients.

Intentional practice feedback after your attempt

3a+4.

Collect a terms; the constant stays separate.

Optional scaffold

Multiply both terms.

Intentional practice feedback after your attempt

4y−12.

4×(−3)=−12.

Optional scaffold

Keep the factor sign.

Intentional practice feedback after your attempt

−3a−6.

Multiply the positive 2 by −3.

Optional scaffold

Expand to check both terms.

Intentional practice feedback after your attempt

4(2a+3).

HCF of coefficients is 4.

Apply

Optional scaffold

Compare powers as well as letters.

Intentional practice feedback after your attempt

5x; 3x+2y; 5x²; 3x²+2x.

Only identical letter parts combine.

Intentional practice feedback after your attempt

5x−10; 8x−6.

Expand first, then collect terms.

Optional scaffold

Write all four sides before collecting.

Intentional practice feedback after your attempt

2(x+2)+6=2x+10 cm.

Two lengths and two widths.

Optional check after C2: substitute x=2 in 3(x+4)−2(x+1) and x+10; both give 12. Numerical agreement is a check, not proof for every x.

Apply and extend

Intentional practice feedback after your attempt

Expanding gives 6x+72. Correct: 6(x+2).

Divide every original term by the factor.

Intentional practice feedback after your attempt

3x+12−2x−2=x+10.

Algebra proves all values; a substitution only checks one.

Access, Scaffold, Core and Stretch support the same goal. Stretch deepens reasoning for either qualification tier.

Recall & Review

Retrieval without notes

Six retrieval points. Enter a number, decimal, fraction such as 3/2, or mixed number such as 1 1/2. Equivalent numeric values are accepted. Unsupported notation goes to teacher review. For rounding, also communicate the requested accuracy in written work; numerical scoring cannot judge significant trailing zeros.







Not checked.

Independent exit evidence

P1–P2: five minutes, no notes, 4 marks. Your teacher reviews working and explanations. Full assessment solutions are not embedded.

Recall & Review and prepare

An equation states that two expressions are equal. Solve by applying the same inverse operation to both sides, then substitute the solution into the original equation.

Retrieve F1 again in one week. Bring your working and one question.

Your progress summary

Completion records attempts, not mastery. Retrieval points describe the latest checked attempt. Your teacher reviews P1–P2 separately and checks retained understanding after a delay.

Restore a backup

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Optional extension activities

Stretch

Check after attempting

6x−15−2x−8=4x−23.

Deep challenge

Check after attempting

3x(2x+3).

Recall & Review: feedback and extension integration

Lesson L018: Collect expand and factorise

Objective: Collect like terms, expand a single bracket and factorise a common factor. Explain how these equivalent forms are connected.

60-minute structure: 0-7 Connect & Check; 7-14 Share; 14-25 Present/model; 25-44 Apply route choice/practice; 44-52 independent exam-style check; 52-60 Recall & Review, WWW/EBI and next step.

What Went Well (WWW)

I wrote the algebraic structure accurately and used a valid step-by-step method.

Even Better If (EBI)

I will show inverse operations clearly, keep signs/brackets accurate and substitute back to check.

Stretch and deep challenge

Stretch: Expand and simplify 3(2x−5)−2(x+4).

Deep challenge: Factorise 6x²+9x fully and check by expansion.