Embedding worksheets and activities

As long as the author of the worksheet has allowed embedding it in another website, it should be OK, but it does no harm to contact the author first. You can leave a message at the bottom of one of their worksheets, or look for a "contact me" worksheet.

As far as I've been able to guess from your website, you are aiming at gathering a collection of downloadable .pdf files, am I right? If that's the case, there might be a problem, because the terms of use of THIS website forbid using materials already published on other websites. Of course that would not be exactly the case, because you would publish them AFTER they have been published here, but still, I'm not sure about the legal implications. Maybe you should make it very clear whether you want to just embed worksheets from this site into yours, which is OK if the author allowed it (otherwise you won't be able to do it), or rather you want to download a .pdf from this site and upload it to yours, which I'm not sure about. Maybe you should contact the liveworksheets administrator first and get a clearer answer than the one I can give you?