In American English it is usually "toward" - whereas "towardS" seems to be more common in the UK.

This has been discussed before. Towards is also used in the AE (I am not sure if it is entirely regionally based or not), but most editors of major publications seem to prefer the shorter form, toward, and so towards is used less in published texts, like newspapers. Personally, I continue to both say and write towards.

I support Sharper. My husband, who has lived in Michigan, U.S. almost his entire life says "towards". I have lived in various Midwest states, though predominantly in Michigan. I say "toward".

The American Heritage dictionary says this on the topic: Some critics have tried to discern a semantic distinction between toward and towards, but the difference is entirely dialectal. Toward is more common in AE; towards is the predominant form in BE.

Note that the dictionary says "more common" and "predominant". Neither is used exclusively in either country. I have no idea about Canadian English, Indian English, Australian English and so on, but I suspect there is variation in those varieties, too.

@Amy-MiMi: you have to consider the source, though. Your husband comes from a place where they say things like "acrosst" instead of "across." What would Michiganders know about such matters? ;-)

Re #2 and #3.

Your husband comes from a place where they say things like "acrosst" instead of "across." (#4)