American Philatelic Society
The American Philatelic Society (APS), established on September 14, 1886, is the largest nonprofit stamp collecting foundation of philately in the world. The American Philatelic Center is located in Bellefonte, Pennsylvania and was dedicated in June 2004 and can be visited throughout the year. The APS provides many services including on-site and online sales, expertising services, and educational opportunities and publications. The building has a museum side and a library side. The museum side houses an airmail exhibit as well as other themed exhibits.
American Topical Association
Founded in 1949 in Milwaukee, Wisconsin, the American Topical Association is the world's largest organization dedicated to topical and thematic collecting. The ATA promotes topical stamp collectors with online and print resources. The ATA has many types of memberships including youth and international.
APS YouTube
This APS- sponsored Youtube channel is LOADED with videos, "stamp of the week", APS Stamp Chats, and many more resources and fun stuff.
Learning About Stamps Online
This is a forum for colectors to discuss philatelic topics. LASO sponsors a ZOOM meeting held on the third Tuesday of every month from 8 PM-9 PM Eastern. There are recordings, documents and other resources and guides available. There is information for scouts to earn a merit badge.
APRL
There are many ways to research your philatelic items. The APRL (American Philatelic Research Library) located at the APS headquarters in Bellefonte, Pennsylvania is a very accesssable option. From the APRL: "The APRL has one of the world's largest and most accessible collections of philatelic literature. Its nearly four miles of shelving containing more than 23,000 book titles and 5,700 journal titles as well as catalogs (general and specialized), government documents, auction catalogs & price lists, stamp show programs & palmares, exhibits (copies of philatelic exhibits), CD- and DVD-ROMs, and research and archival collections". Researchers can request scans, borrow a book or have the APRL do some research by submitting an online request. Library services may have a fee. Some library items are available online to APRL members.
National Postal Museum
Another way to research is to visit the National Postal Museum at the Smithsonian Institution in Washington D.C. This museum is always free and is open daily. The Museum publishes a free online newsletter called Postmark. Go to the Museum website to sign up if interested.