There are many ways for you to keep in touch with the teacher community.
Please visit Free Resources For Teachers. We will be adding more there.
Google for Educators is a good way of keeping in touch with the teachers community, sharing your plans, etc. - Read about it here - Google For Educators Post
You can also become a member of ELTechs Association - you can share ideas with other teachers and get answers for your questions.
There is a site for teachers which may be of interest to you.
If you look at this Squidoo Lens Free Online Courses you will find other sites where teachers can submit their teaching courses.
There are places where you can submit PowerPoint Presentations and videos.
To answer the second part of your question -
Is there anyway I can teach on net n earn from home?
Yes there are many ways you can earn from home.
You can prepare your own course and sell them online.
You can offer coaching programs for students.
You can work on projects with other online marketers.
For creating your own website and earning online please visit Ask Rangoo FAQ.
UGC NET SLET CSIR examinations are very popular with teachers and students. Similarly there are a number of other examinations students need materials for. You could choose a particular area to focus on and produce something useful for that community of learners.