Project-based learning allows students to learn by doing and appling ideas. A project-based classroom allows students to investigate questions , propose hypotheses and explanations , discuss their ideas , challenge the ideas of others and try out new ideas. ın this learning methot have five features. So teachers start with a driving question , a problem to be solved. second students explore the driving question by participating in process of problem solving. Third students, teachers and community members engage in collaborative activities to find solutions to driving question. fourth , while engaged in inquiry process , students are scaffolded with learning technologies. And the end of this process students make a set of concrete products that address the driving question. ın project based science, students engage in real , meaningful problem that are important to them and that are similar to what scientist do. Student performance on curriculum based post tests , compared to their pretest performance , showed statistically significantly gains across all project . students who used more than one LETUS unit did significantly better on the state examination than students who used only one LETUS unit. And students motivation show hat students ' attitudes in science remain positive.

1-) How we could provide an environment to students sould  learn more effectively by developing artifact ?

2-) What level  teachers sould provide feedback  to students ?