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So, where is this extra credit?
I don't see it anywhere?
Jason AndersTreehouse Moderator 145,541 Points
Any Extra Credit programming can be found in the core list for the course. You don't actually get any points in Treehouse, nor is there any instructions or files to use. Extra Credit here is more like "here is an idea, now go and practice," which is very helpful if you want to do extra, but not sure what to do.
The 'extra credit' you are referring to can be found on the "Ruby Collections" page. If you expand the "Building a Grocery List Program," the 'idea is at the bottom.
Keep Coding! :)