Verified answer

subsequent=later, future, following

subsequent means following or after something else.

So subsequent learning means what you have learned since previous learning.

Example.

After finishing school I subsequently learned advanced French.

That which has enhanced your learning, in addition to or after your introduction to the original assignments related to or required during the learning tasks.

Did you read extra material, interview people, visit museums, watch video, do experiments, or researched the topic further in some way.