Mathematics for Teaching Category: Geometry

## Category: Geometry

### Angles are not that easy to see

Like most numbers, geometric objects such as angles, are abstraction from properties of real objects and quantities. For example, the idea of “two-ness” can be abstracted from real objects such as two apples, two chairs, two goats, etc. It will not take along for a learner to figure out what the idea of two means….

### How to scaffold problem solving in geometry

Scaffolding is a metaphor for describing a type of facilitating a teacher does to support students’ own construction of knowledge. It is usually in the form of questions or additional information. In scaffolding learning, we should be careful not to reduce the learning by rote. In the case of problem solving for example, the scaffolds provided…

### Teaching triangle congruence

In this post I propose a way of teaching the concept of triangle congruence. Like most of the lessons I share in this blog, the teaching strategy for this lesson is  Teaching through Problem Solving. In a TtPS lesson, the lesson starts with a situation that students will problematize. The problems either have many correct answers…