Hello Atul,
Warm greetings..!!
I read your requirement for educational portal and would like to assist you in that.
We are an offshore development company having team of dedicated developers and designers in PHP, HTML5, CSS, Wordpress, Magento, Zend, Joomla, android and Iphone applications.
Is there any particular platform in which you want your site??
Do you need payment gateway??
These answers would be helpful.
As per my understanding and/ or suggestion, you need responsive design.
Further we will discuss in brief about the project.
Looking forward to hear from you.
Regards
Vasudha Chaudhary