This multi base ten class set consists of 100 units, 10 longs, 10 flats and 1 solid cube, with a total of 121 pieces. It is a quality base ten set made from durable plastic. Each unit measures 1 cm (L) x 1 cm (H) x 1 cm (W), each long 10 cm (L) x 1 cm (H) x 1 cm (W), each flat 10 cm (L) x 10 cm (H) x 1 cm (W), and each cube 10 cm (L) x 10 cm (H) x 10 cm (W). Base ten blocks are a versatile maths manipulative to introduce students to basic key maths concepts including addition, subtraction, number sense, place value and counting. The units represent 1, the longs represent 10, the flats represent 100 and the cubes represent 1000. Students can use the blocks to practice with place value. They can also use the blocks to create different patterns. When longs are used in combination with other base ten units, flats or cubes, students can practice with addition and subtraction of larger numbers. They are also great for free play and allows children to build structures with base ten. Use the different sized blocks for seriation or compare different lengths of the blocks or sets of blocks. Try to make a meter with different sized base ten blocks and make a square meter. Find out how many blocks you need and if you can find a way to use less blocks. The possibilities are endless!