This study aimed to assess the validity and usability of Foundation in Social Science module as perceived by the students of Bachelor of Secondary Education Major in Social Studies of Laguna State Polytechnic University Santa Cruz Main Campus, Santa Cruz, Laguna. It specifically sought to answer the questions: 1.) What is the level of validity of Foundation in Social Science module in terms of: a.) content, b.) construct, c.) face value, and d.) criterion? 2.) What is the level of usability of Foundation in Social Science module terms of a.) learnability, b.) efficiency, c.) memorability, d.) error prevention, and e.) satisfaction? 3.) Is there a significant relationship between validity and usability of Foundation in Social Science module as perceived by the students? The researchers employed the descriptive-correlational design in gathering and treating data for the foregoing investigation. Thirty-one (31) students of Bachelor of Secondary Education Major in Social Studies were the respondents in this study under purposive sampling technique. One set of questionnaire was issued to the actual respondents. To avoid guesswork and obtain reliable data and information, Likert-type of questions were provided. The weighted mean scores of 4.46, 4.47, 4.51, and 4.42 have shown that the module’s validity in terms of content, construct, face value, and criterion, respectively, are excellent. Likewise, the average mean scores of 4.32, 4.25, 4.22, 4.37, and 4.43 have also shown that the module’s usability in terms of learnability, efficiency, memorability, error prevention, and satisfaction, respectively, are excellent. The computed p-values have shown that there are significant relationships between the validity and the usability of the Foundation in Social Science module. As such, the hypothesis stating that there is no significant relationship between the validity and usability of Foundation in Social Science module as perceived by the students was rejected.