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Students learn how to use the balance to form and solve linear equations. Learning progresses from solving one step equations to setting up equations where the unknown appears on both side.

This unit takes place in Term 6 of Year 7 and follows on from writing with algebraic notation.

- use and interpret algebraic notation, including:
- ab in place of a × b
- 3y in place of y + y + y and 3 × y
- a
^{2}in place of a × a, a^{3}in place of a × a × a; a^{2}b in place of a × a × b - a/b in place of a ÷ b
- coefficients written as fractions rather than decimals

- simplify and manipulate algebraic expressions to maintain equivalence by:
- collecting like terms
- taking out common factors

- When solving equations students should use a scale to visualise how it remains balanced.
- A secure understanding of the order of operations and inverse operations is needed to keep an equation balanced.
- By solving the equation you find the value of the unknown number.
- When forming equations students often become confused with using brackets.
- An equation can have a positive or negative solution which could be presented as a simplified fraction rather than a decimal.

Develop fluency

- Move freely between different numerical, algebraic, graphical and diagrammatic representations [for example, equivalent fractions, fractions and decimals, and equations and graphs]
- Develop algebraic and graphical fluency, including understanding linear and simple quadratic functions

Reason mathematically

- Identify variables and express relations between variables algebraically
- Make and test conjectures about patterns and relationships; look for proofs or counter-examples

Solve problems

- Begin to model situations mathematically and express the results using a range of formal mathematical representations

Algebra

- Understand and use the concepts and vocabulary of expressions, equations, inequalities, terms and factors
- Use algebraic methods to solve linear equations in one variable (including all forms that require rearrangement)

July 6, 2019

Earlier this week, my school took part in a trial OFSTED inspection as part of getting ready for the new inspection framework in September 2019. This involved three Lead Inspectors visiting our school over the course of two days. The first day involved a ‘deep dive’ by each of the Lead Inspectors into Mathematics, English […]

June 30, 2019

The method of how to solve quadratics by factorising is now part of the foundational knowledge students aiming for higher exam grades are expected to have. Here is an example of such a question. Solve x2 + 7x – 18 = 0 In my experience of teaching and marking exam papers students often struggle with […]

June 24, 2019

When learning how to write 3-part ratios students need to understand how ratios can be made equivalent. The start of the lesson reminds students by asking which of six ratios is the odd one out. This is presented to the class as they come into the lesson. Writing Equivalent Ratios A few students immediately go […]