The last two learning objectives should be written per guidelines: 'Learning objectives for the lesson and its episodes are clear, descriptive, and measurable. They focus on the skills being taught and not the functions/tools e.g. “filter the rows of a data frame based on the contents of one or more columns,” rather than “use the filter function on a data frame.”'
Checklists - I wonder if these are better off tagged as exercises?
More weird headers? Maybe Overview reports and Edit functions should be h2 because Profiling your MARC data is already the page title
"Locate errors using the field count report" challenge - maybe explicitly add within the challenge that people should answer what needs to be changed/removed, otherwise the solution points 3 and 4 feel like "extras". Remove the comma after "For the record" for those solution points 3 and 4 as well, and point 3 looks like the end part needs to be de-mathified
"Run find function" checklist - second last sentence has typo "MARC tage" and last sentence does not appear to have the mentioned two spaces
"Correct the missing 245 field" challenge - might be worth including the incorrect line of text that needs to be changed in the solution as well so it is clear what needs changing. I would recommed the challenge text ask that people should try to fix the record themselves rather than just identifying what is wrong, as this is what the solution text has implied they should be doing
[Validation and Log Reports](https://librarycarpentry.github.io/lc-marcedit/05-profiling-your-MARC-data.html#validation-and-log-reports) Validate ISBNs bullet point - the text wrapping (on my screen at least) makes the example with space not super obvious that there is a space there. Is there a way you can force that text to stay on one line together? May also be good to have an example of the incorrect format as well
[MarcValidator Report](https://librarycarpentry.github.io/lc-marcedit/05-profiling-your-MARC-data.html#marcvalidator-report) Check MARC Using Rulings File bullet point - link included for text "The Rules file" does not appear related to the content
How could the content be improved?
Profiling your MARC data page: