S2.N5.a Use algebra manipulatives, e.g. algebra discs, to explain the process of expanding the product of two linear expressions of the form px + q, where p and q are integers, to obtain a quadratic expression of the form ax² + bx + c.
S2.N7.a Use Graphmatica, applets or other software to draw the graph of ax + by = c (a straight line), check that the coordinates of a point on the straight line satisfy the equation, and explain why the solution of a pair of simultaneous linear equations is the point of intersection of two straight lines.
S2.N7.b Draw the lines x = a and y = b, and describe the lines and their gradients.
S2.G4.a Either (i) use strings of 12 units (e.g. 1 unit = 10 cm) to form a right-angled triangle with sides of whole unit lengths (e.g. 3 units, 4 units and 5 units) and find out if there is a relationship involving the three sides; or (ii) use cut-out pieces of two squares with sides 3 units and 4 units respectively to form a square of sides 5 units.
S2.G4.b Discuss the use of trigonometric ratios in real life, e.g., find the height of a tree/a building by measuring the angle of elevation with a clinometer.
S2.G5.6 volume and surface area of pyramid, cone and sphere