GO SOLO

I found SOLO taxonomy useful to teach Co-ordinate geometry.

At a pre-structural level (NA) Students are expected to use

 less than two different co-ordinate geometry methods.

At an unistructural level (A) Students are expected to use

 at least two different co-ordinate geometry methods. 

Working must be shown and they need to indicate what

 the calculated answer represents.

Multistructural level (M) Relational thinking could be 

shown by the student making conclusions about the

 properties of trapezium ABCD or one shape within the

 trapezium, based on their gradient and length calculations. 

Working must be shown in context and a conclusion 

clearly stated (at least two methods).

Relational thinking (M+, E-) Extended abstract thinking

 could be shown by the student making further observations

 about the shapes formed by a line segment from M 
(M is a midpoint of AB)

(at least two methods).