You have just mentioned that you are interested in helping others by your knowledge and asked a permission. Kindly mention which category do you like to choose and mention it here, so that the members would give you guidance to that particular forum thread where you can ask the permission to the respective co-ordinator. Unlike you have just mentioned that you are interested, this creates a confusion among the responses that what information to be given you about.
I am mentioning some sections here for the help as you are a new member,
1. If you like to submit some practice test questions, you may visit the page as follows and ask for the permission over there. By reading the forum message you will get a clear idea about this section,
2. There is a section called school section where you have to submit the schools that are given to you. Primarily this work was started from the schools of USA, the link is - http://studyvillage.com/forum/320-Schools-section-post-get-paid.aspx
3. You may submit the paper craft items that are done by you in either descriptive way or through a video and can ask a permission over here - http://studyvillage.com/forum/391-Make-paper-craft-other-activities-for-children-get-paid-Rs-per-post.aspx
4. There are various other sections where by seeing them once, you can get the idea like previously submitted resources in http://studyvillage.com/resources/Category5005-Printables.aspx link.