The document discusses the use of virtual manipulatives and computer-assisted instruction in primary numeracy classrooms. It notes that instructional outcomes should determine appropriate technologies, not the other way around. Virtual manipulatives are digital representations that can help develop mathematical understanding in similar ways to physical manipulatives. They can also overcome classroom management issues and be accessed from home. The document also provides guidance on effectively integrating computer-assisted instruction and considers how different technologies like interactive whiteboards and web tools can support teaching and learning.