The aim of the current research is to identify the effect of How can we develop a unit of science curriculum for the second preparatory grade based on the strategy of Woods for development of attitudes towards the rationalization of sustainable consumpton. The researcher uses the experiment method in her study to be administered upon a sample consistes of (60) the second preparatory grade students, they are divided into two groups, an experimental group (30) pupils and a control group (30) pupils. The Research uses Pre-application of tools (a list of concepts of sustainable production and consumption suitable for the second grade preparatory students- Scale of Attitudes towards Rationalizing Sustainable Consumption.-Scale of Critical Thinking on both groups (an experimental group , and a control group pupils. The experimental group has been treated then a post–application is administered on both group. For examination signification of differences between averages,a T. Test is used for two independent sample accompanied by a statistical treatment of SPSS Program.