Once the HTU of ones is understood, repetition of the three-column principle makes larger numbers easily accessible.
Many resources follow the HTU of ones by introducing a fourth column, units of thousands, which is difficult to grasp and wrecks the elegance and simplicity of the ‘triad’ number system.
This resource contains PowerPoint presentations providing whole class/group activities to develop mental dexterity and a deep understanding of the triad principle of place value.
The HTU set interrogates the pupils’ understanding of three-digit numbers and contains an introductory PPT plus 3 resource packs each containing 4 PPTs, each of those comprising 13 slides.
The HTU,HTU set interrogates the pupils’ understanding six-digit numbers and contains an introductory PPT plus 3 resource packs each containing 4 PPTs, each of those comprising 36 slides.
The HTU,HTU,HTU set interrogates the pupils’ understanding nine-digit numbers and contains an introductory PPT plus 3 resource packs each containing 3 PPTs, each of those comprising 52 slides.