An excellent interactive website for mapping Revolutionary War tactics from 1775 to 1781  can be found at: 
http://www.geoamericas.com/view_maps/standards_organization.asp#us_era_1  
By selecting the Flash Interactive button on Revolutionary War, 1775-1781, the viewer may see different aspects of the  war including major American and British fortifications, battles, and victories.  These may be viewed separately in layers, or altogether. 

An outline map of Colonial America in 1776 may be copied and printed from the website http://www.eduplace.com/ss/maps/historical.html . 

Using these two sites together students may complete their own Revolutionary War mapping assignments.