Learning Resources Place Value Disks. Introduce place value from an early age with these bright and colourful counters! Place Value Disks are colour-coded into units, tens, hundreds, thousands, ten-thousands, hundred-thousands and millions for easy recognition. Ideal for counting and addition and subtraction activities. Includes 280 disks, 40 of each value. Disks measure 2.5cm D. These hands-on maths manipulatives support the maths mastery approach to teaching! Suitable for ages 4+.