Learning and Teaching Mathematics, 28, June 2020
 From the Editor. Duncan Samson
 'Our brains really don't like abstract ideas!' Using representations deliberately and carefully to help
students access abstract mathematics. Marc North
 Using combinatorial games to explore equivalences and differences. Adi Niv & Dorit Patkin
 Intercepts of cubic functions. Letuku Moses Makobe
 The power of prime factorisation. Duncan Samson
 The area of concave and crossed quadrilaterals in terms of their diagonals. Michael de Villiers
 The two arrows model for proportional reasoning. Patrick Chiro
 Apparent distance between the goal posts. James Metz
 A simple proof of Stewart's theorem. YiuKwong Man & KinKeung Poon
 Axis intercepts and centres of circles: An alternative approach. Alan Christison
 Summing the reciprocals of the roots of a polynomial equation. Letuku Moses Makobe & Duncan Samson
 A simple proof of the area formula for convex quadrilaterals. YiuKwong Man
 Constructing a bicentric quadrilateral. Victor Oxman & Moshe Stupel
 Proof without words: The perimeter of any right triangle is equal to the sum of the diameter of its incircle and twice the diameter of its circumcircle. Moshe Stupel & Jay Jahangiri
