This is a super fun and great activity that will train the student's eyes in spatial reasoning. It would be a great warm-up activity to introduce student to drawing from a grid or a just a Fun Friday Game with students. I attached the Standards K-12 on the last page.
I has a reflection sheet with a inquiry based short writing assignment that you could assign as homework.
Materials needed for this activity are objects to hide over the square like in the game BINGO. You can use cut up paper, cheerios, M&M's, it's up to you.