The most significant aim of education is closely related to the aims of mankind, which in turn are determined by the philosophy of life. As a discipline of study, Geography has an outstanding potential for generating future global citizens. Education on climate change is highly essential to understand what climate change is, how climate change is brought about, what its consequences are, and how to mitigate such effects. This study aimed to develop an ICT-based Instructional Package in Geography to enhance awareness on Anthropogenic Climate Change and critical thinking of Secondary School Students. Tools and learning materials developed and used are ICT Based Instructional Package in Geography, Awareness Test on Anthropogenic Climate Change, the Test on Critical Thinking and a Rating Scale for the validation of the ICT Based Instructional Package. The ICT Package based on Generative Learning Model incorporated multiple learning media on nine topics related to Anthropogenic Climate Change. The analysis reveals that mean post- test scores are significantly greater than the mean post-test scores of the students in the treatment group indicating the effectiveness of the instructional package implemented. The instructional package used to deliver lessons and transact content on climate change has made it easier and more effective for learners to excel in their studies on anthropogenic causes by thinking critically about real situations. Instructional packages are of great importance in the field of education designed specifically to support, mediate and be a reference tool to expand students' thinking and adhere to social and environmental values sustainably.