How could the content be improved?
The data splitting exercise with the lat/lon coordinates asks to rename the columns but renaming is not introduced until later (renaming columns: https://datacarpentry.org/OpenRefine-ecology-lesson/instructor/04-transforming-data.html#renaming-columns)
Which part of the content does your suggestion apply to?
https://datacarpentry.org/OpenRefine-ecology-lesson/instructor/04-transforming-data.html#data-splitting