Metric units in inch Assembly

Hello,

I am just now creating parts in an Assembly.  In the past I have created seperate parts and inserted them into the Assembly.  Anyway, when I create a part in an Assembly set up as inches (IPS), the part is metric.  I know how change it back to inches, (Options > Document Properties > Units > IPS) but when I create another part it goes back to metric.  Is there some setting that I have missed so that parts created in my IPS Assembly will also be IPS?

SolidworksAssemblies