
1) Agendas 2) Ballot lists 3) Ballot rosters 4) Blackboards 5) Bluish-grays 6) Candidate listings 7) Candidate lists 8) Candidates lists 9) Chalk tablets 10) Chalkboards 11) Criticises roofing material 12) Dressy dockers line 13) Early schoolroom needs 14) Election day lineups 15) Election Day lists
Found on
https://www.crosswordclues.com/clue/slates

1) Agendas 2) Lists 3) Pans
Found on
https://www.crosswordclues.com/clue/slates

Slate is a rock formed by subjecting fine soil to heat and pressure. It can be split into fairly thin layers. There were historically many kinds and colours of slates used for roofing churches. The commonest were West Highland, or Scotch slates, from Argyll, bluish grey in colour, and Welsh slates, thinner, and usually grey or purplish. Greenish sl...
Found on
http://www.encyclo.co.uk/local/20938

These were pieces of slate (like a flat stone),which were sometimes set inside a wooden frame. These were used for practising writing. A special slate pencil was used with them. At the end of the lesson the slates were wiped clean with an old cloth.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

Fine grained metamorphic rocks
Found on
https://www.encyclo.co.uk/local/20501
No exact match found.