A directory of useful objects found on the web for teaching Maths.

Browsing by The Australian Curriculum

Apply logical reasoning, including the use of congruence and similarity, to proofs and numerical exercises involving plane shapes (ACMMG244)
* presenting formal geometric arguments to develop skills in mathematical reasoning and presenting reasoned arguments (proofs)
* using mathematical language and notation, based on congruence and similarity
* applying an understanding of relationships to deduce properties of geometric figures (for example the base angles of an isosceles triangle are equal)
* distinguishing between a practical demonstration and a proof (for example demonstrating triangles are congruent by placing them on top of each other, as compared to using congruence tests to establish that triangles are congruent)