from the National Council of Teachers of Mathematics. It's a great way for students to work with fractions by combining like pairs. Students move markers across the board based on the cards that are flipped over. The goal is to move all the markers from one side to the other using the fewest amount of cards. The instructions are clear and offer good examples. The exploration section asks questions about what the player discovers after playing several rounds. You can also find a lesson plan for using a fractional clothesline for enrichment.