I’m super intrigued by this variant of Tic-Tac-Toe called Tic-Tac-Toe Squared from Giant Book of Puzzles and Games by Sheila Anne Barry. This is another book that you can borrow from the Internet Archive’s Open Library for free.
If you love using puzzles in your classroom, I get a lot of my puzzle making inspiration from puzzle books that I’ve borrowed virtually through the Internet Archive.
