Hello.
Please submit your changes grouped into smaller geographic regions. There's no reason for the same changeset to contain changes from Canada and Dubai.
In OSM multiple values are separated by ; not -. So if you want to list grades K-12, you have to explicitly list each one separated by ; Otherwise, it's recorded exactly as "K-12".
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            Published using OSMCha: https://osmcha.org/changesets/149592826
            