Draw your final idea as an Orthographic Drawing. You should have at least two views with dimensions.

British Standard / International Standard symbols and conventions should be applied to the working drawing.

Add an isometric / perspective estimated sketch of your final design.

Links to more infromation on Orthographic Drawing:

1. Introduction to Third Angle Orthographic Drawing

2. Third Angle Orthographic Drawing - an Example

3. Third Angle Orthographic Projection - Further Explanation

4. Wind Power Device - Orthographic Drawing

5. Dimensions (Measurements)

6. Working Drawings

8.  Orthographic Drawing - Mobile Phone Example

9. Stages of Drawing a Mobile Phone in Orthographic

10. Presentation of an Orthographic Drawing

11. Orthographic Drawing Exercise