Each worksheet has twelve positions from real online games, six mates in one and six mates in two, with a line for the solver's name and an answer key on the last page. They are A4 PDFs (they also print fine scaled to US Letter) and free to copy for a club, a classroom or a chess camp.

White to move and mate in two moves.
22. Rc8+ Ke7 23. Nd5#
More interactive puzzles on Lichess: Eight checkmates from real online games.