I want to build a school website. Teachers want to enter student's grades & each student want to see his grades. Students want to communicate teachers and ask their questions. Is there any Free or Commercial component to do that ?
you can use LMS for this, you can see it at this link _http://extensions.joomla.org/search?q=lms, but for your needed, how about using moodle, the powerfull learning CMS, i think this is the best solution...
how about this extensions.joomla.org/extensions/vertical-markets/education-a-culture/teaching-a-learning/3715?qh=YToxOntpOjA7czozOiJsbXMiO30%3D