The importance of testing a design using paper-in-screen prototypes is also explored, and its pros and cons are established .the use of the paper-in-screen prototypes is looked at and an emphasis is made on its use among UX practitioners. This technique is generally seen as a bridge between hi-fidelity prototyping and paper prototyping. This Article is from UX Magazine (Pulido, 2011). The surprising thing about prototyping is the fact that it is a simple technique yet it is applicable in making designs of many complex devices such as physical devices, web and mobile applications. In this article for instance a particular form of prototype such as the paper-in-prototyping that has uses simple material i.e. A paper to develop is highlighted....

Paper is available and hence prototyping ban be termed as low fidelity. The procedure of developing a prototype is also simple and can be easily followed by anyone and they successfully develop a functional prototype. A designer can sketch several paper prototypes that can be used to conduct a usability test or heuristic evaluation. It is hence a useful method that is not time consuming and is also simple to test and understand.
References

Maner, W. (1997). Prototyping. Retrieved November 5, 2012 from http://csweb.cs.bgsu.edu/maner/domains/Proto.htm#7

Pulido, D. (2011). Paper-in-Screen Prototyping. UX Magazine, 652, 2.Retrieved November 5, 2012 from http://uxmag.com/articles/paper-in-screen-prototyping