With effect of constructivism paradigm on education, students’ thinking and decision making process skills rise to prominence. So to develop students’ thinking and decision making skills become more important than before. Argumentation, problem solving, experiments, hands on activities and performance tasks are more general approaches that being use by teachers to develop students’ thinking and decision makes skills.

In any task, students’ thinking levels are different. Researchers stated that student’ knowledge about task and content knowledge, self-efficacies and awareness related to cognitive process effect students’ thinking levels. So students’ metacognitive knowledge and skills affect students’ thinking processes.

As a result we engage about title represented below in this special issue;

1. New trends in assessing students’ thinking and decision making skills
2. Students’ thinking process in problem solving, performance task etc.
3. Students’ decision making skills in problem solving and argumentation etc.
4. Students’ metacognitive knowledge and skill
5. Teaching approaches to develop students’ argumentation, thinking, decision making and metacognitive skills.