I recently bought ipad for personal use. However, no ports for Usb's -I used a lot- How do I save any data I find on the net? Should I buy Apple laptop or ipad extension. I am teacher want to use in classroom situation.
What kind of data are you trying to save from the Internet to the iPad?
With certain document types (such as PDF files), you will get an "Open with..." button in the upper right corner of the document when you open it in Safari. From there you will then be able to choose which app you want to "open" and essentially save that document with. For example, if you view PDF document from the Internet, you can then use the "Open with..." button to open that PDF in iBooks. This will also save that document to iBooks.
The types of documents that offer the "Open with..." button will depend on what apps you have installed on your iPad. Basically, you need an app that can "handle" that type of document.
You can also get documents on an iPad by either syncing them through iTunes (assuming you have an app that works with the document type and supports syncing through iTunes) or by using some sort of third party cloud service (Dropbox is a very good choice...the Dropbox app have the built-in ability to view the "big" types of documents...i.e. PDFs, Word files, Excel files, and PowerPoint...note that the viewing is very basic).
It really will depend on what you want to try to do with it. If you are specific on how you would like to use it (i.e. what specific tasks do you want to do with it), then we can likely be more specific.