Many of the resources available from publishers' sites have specific relevance to their own published or produced resources naturally. Garratt Publishing commenced this year with a specific Religious Education outreach initiative called REmail and its second issue dealing with Mary, the Blessed Virgin is available offering ideas and activities for both Primary and Secondary grades. It's first issue dealt with Social Justice. It could be expected there is a greater chance of usefulness from the Garratt offerings because it is an Australian publisher and distributor. Resources that may be referred to have a better chance of already being within an Australian Catholic school's collection. You can opt to subscribe to REmail which means that you'll get a heads up in your in-box when a new issue is available.
St Mary's Press (Winona, Minnesota) has an online resource center with multimedia offerings and worksheets, many are freely accessible for all to use while for others a log in is required. As it is a major Catholic publisher, the range of free resources is good.
Click on the following links for free religious education resources.
REmail Issue 2: Mary
Caritas Australia Multimedia
Caritas Australia Education Resources
RESource, an initiative of the Catholic Education Office, Melbourne
St Mary's Press Resource Center