Need for preteaching Students with LLD benefit from preteaching before being introduced to new topics in class.These students often make poor progress in maths and reading in large groups.The reality is that one teacher with thirty students will not have the time to work through important processes, such as editing, at a pace needed by students with LLD. It is difficult to cater for individual needs (for detailed, intensive instruction) in bigger classes where teachers have a large amount of content to work through.