Our consideration is on the workload of Science as a subject relative to Math as a subject, based on MOE curriculum guidelines. The other consideration is what is the right amount of work on a daily basis (across different subjects), we do not want to stress out children by imposing excessive daily work load. Therefore, we reduce the daily challenge workload and peer challenge workload on daily basis, so that to maintain the children's motivation level and sustainability of learning (multiple subjects) on KooBits platform.