While Piaget argued that stages of development is important concept to determine which information a child can learn ,according to Bruner's notion of 'spiral curriculum', knowledge can be represent to child at almost any age with appropriate material for child. According to him curriculum should be designed from simple to complex, general to detailed and abstract to concrete manner and it named as spiral curriculum. Bruner suggested that learner obtain knowledge by discovering. Hence, sometimes learners are not presented subject matter as a whole and they are allowed to develop their own learning. So, in the discovery process teacher should be as a guide. In Bruner's theory the guide of teacher is much more than Piaget's theory. In my opinion, while in Piagetian perspective, instruction is based on exploration within the real life; Bruner gives importance learning by discovering. So, instructions should be organized by giving opportunities to learner for discovering. For instance, in schools role playing, group projects or computer simulations can be help for discovery (Schunk, 2008). For Bruner, sequence is important while presenting material. In both of the theories, instruction should encourage the child for discovery learning; lead individual to make sense the world through cognitive schemes; for example, experiments with real objects may make learning better and in both of the two theories students are actively engaged in the learning process. Also for effective instruction, Bruner states that instruction should associated with learners' predisposition.