Types of education
All these are useful things to be able to do. More correctly they can be useful under certain circumstances, and this is an important characteristic of all instrumentality. To say of A that it is instrumental to B is also to say that we only value A if we value B. Focusing a microscope is of no use to me unless I want to examine micro-objects. Mounting butterflies is not a useful skill to one uninterested in collecting dead butterflies. We sometimes say
that the value of instrumental things or activities is extrinsic to the thing or activity, as contrasted with the intrinsic value of some thing or activity we value for itself rather than for a purpose extra to it.