Here’s one of our favorite challenges! This is a three-dimensional version of tic-tac-toe which is called “noughts and crosses” in Great Britain.
The NRICH website publishes free mathematics resources designed to challenge, engage and develop the mathematical thinking of students aged 5 to 19. NRICH also offers support for teachers by publishing Teachers’ Resources for use in the classroom.
This task can be found at: https://nrich.maths.org/895