Coursework – Developments

Developments are a prominent feature in both the Junior and Leaving Certificate DCG subject, while also being a common feature in everyday life without being recognised.

A development is the folding out flat of an entire 3 Dimensional object onto a 2 Dimensional plane. In doing this, the students is creating a drawing of what a sheet of material was initially shaped like before it was folded into a particurlar object

Opening a door on a press is a partial form of a development as you are folding one surface of an object out flat onto the same plane as another surface.

Since this is a Transition Year Module, the development course of work has been broken down and specific elements selected in order to produce 4 lessons which cover certain basic principles which should be covered over a 2-3 week period. The areas covered in this topic are basic objects and objects with curved, inclined and cut surfaces.


Lesson 1 commences with the basics around developments and how to correctly unfold an object out flat, hence creating a development.

Lesson 2 deals with objects that display inclined surfaces like a hexagonal prism and how to correctly create a development that incorporates these particurlar surfaces.

Lesson 3 looks at cut and circular surfaces in order to force the students to index various points on their drawings and also to visualise different scenarios and how to overcome these issues on their own.

Lesson 4 is a set of challenging questions which combine all the principles that have been covered to date and allow the students progress and level of understanding to be examined.

Click on the images on the left hand-side of the page to navigate into a particurlar lesson.