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Jon ManloveJon Manlove 

The 'Hands-On Challenge' for the 'Use Standard List Controllers' module in Trailhead doesn't make sense.

I am attempting to complete the Hands-On Challenge in the 'Use Standard List Controllers' module and the exercise doesn't reflect what I just learned in the module.  For example the apex:repeat command isn't explained so I have no real idea about how to use it.  Can someone please provide an explanation?  Thanks.
<apex:repeat> is something similar to <apex:pageBlockTable> so you should be easily convert your <apex:pageBlockTable> to <apex:repeat>

As Salesforce want you to learn, they will leave these gaps so that people can go and see the documentation :)
Here's the link to <apex:repeat> tag's documentation.