The effectiveness of a proposed unit in chemistry in the light of the Next Generation Science Standards (NGSS) on the depth of knowledge of first year secondary students

Abstract

This research aimed to build a supposed unit in Chemistry for secondary school in light of the Next Generation Science Standards (NGSS) and identify its effect on depth of knowledge for first - grade of secondary school students. To achieve that aim, the descriptive approach was used; to build the proposed unit in light of ( NGSS) and teacher’s guide to teach the unit, also the quasi- experimental approach was used to identify the effect of the proposed unit in the chemistry on the depth of Knowledge levels. The study sample was consisted of (34) students of first grade of secondary school students as a experimental group which studied the proposed unit in the  light of (NGSS)  during the academic year (2020/2019), the test of  the depth of knowledge levels was prepared , pre test and post rest were applied on experimental group. The study results showed that the effectiveness of proposed unit in light of NGSS on the depth   of knowledge levels of first grade secondary school students.  In the light of the findings some recommendations and suggestions were mentioned.