Cards and Counters (C043) is the classic mathematics material for anchoring numeral recognition to quantity in the 3–6 environment, using number cards 1–10 paired with counters that children arrange in two rows beneath each card. The odd-and-even pairing pattern that emerges naturally from the exercise gives children a concrete, self-correcting encounter with a concept that will support later skip-counting and multiplication work. A well-made, durable set is essential for any primary classroom since this material sees heavy daily use across a wide range of developmental stages.