Effective use of cloud computing in educational institutions
1. Introduction
Nowadays, the term “cloud computing” has been an important term in the world of information technology (IT). Cloud computing is a kind of computing witch is highly scalabe and use virtualized resources that can be shared by the user. Users do not need any background knowledge of the services. A user on the internet can communicate with many serves at the same time and these serves exchange information among themselves (Hayes, 2008). Cloud computing is currently one of the new technology trends (broadband internet, fast
connection and virtualization) will likely have a sighnificant impact on teaching and learning environment.

2. Previous studies
Cloud computing  is an emerging application platform and aims to share data, calculations and services among users.
Grossman et al, (2009) developed a cloud-based infrastructure which had been optimized for wide area, performance networks and supported necessary data mining applications. Cloud computing infrastructures accelerated the adoption of different technological innovations in academia and its facilities and resources could be accessed by the colleges as on-demand.
The basic features of cloud computing are presented and compared with the original “grid computing” technology (Aymerich, Fenu & Surcis, 2008). In that perpective, thy also consider that grid computing will play a fundamental role in defining how cloud services will be provided. Based on the literature review and anysis of the current cloud computing service provisions and applications, we also introduce cloud computing to educators and help them to gain a better understanding on the conception of cloud technology and its impact on theaching and learning in institutions.

3. Educational Usage of Cloud Computing
The Cloud delivers computing and storage resources to its users/costumers. It works as a service on demand policy. Cloud computing is a new business model wrapped around new technologies like virtualization. The “/” is used to spate different sectors with the same percentage.
3.1 Requipments
3.2 Proposed Model
· Infrastructure model
· Application model
4. The cloud computing services needed to deliver the majority of IT services needed by customers do not yet exist. There are still problem and constraints with application offerings, service-level agreement, more importantly security issues. All of the cloud providers do not have the same capability for their technological levels.