Although this reply is long after the query, here is an answer for anyone who is interested.
There are many, many grant opportunities for Catholic elementary schools. And you may feel free to contact me with specific questions.
RESEARCH is the key to success. You can find a foundation, but until you find out if your mission and/or needs align with those of the foundation, it is just a name. Having, or making a connection at the foundation is a must. Submitting a proposal "cold" proposal gives you less of a chance of success than a single call to the Grants Administrator.
Try to find smaller family foundations in your area. Those who are your neighbors are more likely to have an interest and maybe even a connection to your school. Family foundations
You may buy, or subscribe to FADICA's Catholic Funding Guide which outlines some of the foundations that make grants to our schools. ($100 for the online version, and around $150 for the book) But this is not the definitve source for this info.
www.FoundationCenter.org is a great resource. You can search your zip, city, state or a keyword search to see who is giving, how much and to which organizations. You can search a foundations 990's (tax return) and scroll down to get specific information on who has received how much from the foundation. This is a limited tool for those who aren't experienced grant researchers. Check out their site to see if your area library has a "complimentary collection" which essentially allows you to do a very comprehensive search of criteria such as "catholic school", "catholic" and "elementary education", etc..,.
*********.com is a similar tool.
An excellent resource for information on foundation grants is checking your neighboring schools (elementary, high school and even college) Annual Reports to see who their donors are.
Google all of the obvious keywords, and you will find many grant opportunities for your school.
Best of luck. The work of our Catholic elementary schools is incredibly valuable, and opening the eyes and hearts of potential funders is good work.