This study entitled “Interak-E-Book: Conceptual Approach in Teaching the Proper and Appropriate Filipino Grammar and Analyzing the Knowledge and Performance of Students” used descriptive research. Its objective is to attain and deliver an effective and good communication skills particularly in comprehension ang writing utilizing interak-e-book as conceptual approach in teaching the proper and appropriate Filipino grammar. In accordance with the level of utilizing interak-e-book as conceptual approach in teaching the proper and appropriate Filipino grammar based on parts according to Objective, Development, Engagement, Assimilation, all of these indicators has a verbal interpretation of Very High. On the other hand, the level of utilizing interak-e-book as conceptual approach in teaching the proper and appropriate Filipino grammar based on characteristic according to Accessibility and Appropriateness has a verbal interpretation of Very High. Meanwhile, the level of the knowledge of performance of students based on comprehension has a descriptive equivalent of Moving Towards Mastery and has a verbal interpretation of Satisfactory. The level of knowledge and performance of students based on writing has a descriptive equivalent of Moving Towards Mastery and has a verbal interpretation of Satisfactory, too. The Objective, Development, Engagement and Assimilation which are parts in utilizing e-book was not observed to have significant knowledge as conceptual approach in teaching the proper and appropriate Filipino grammar based on appropriateness as well as there is no significant knowledge in interak-e-book as conceptual approach in teaching the proper and appropriate Filipino grammar based on accessibility. It was shown in the gathered data that the hypothesis, “There is a significant Effect of Interak-E-Book as Conceptual Approach in Teaching the Proper and Appropriate Filipino Grammar” was not accepted. From the findings and conclusions formed, recommendations were as follows: (1) utilize and continue the interak-e-book as conceptual approach in teaching the proper and appropriate Filipino grammar, it is a good opportunity to learners, parents, and teachers the contribution of e-book to an innovative learning material in the teaching-learning process; (2) this study will serve as guide, source and/or derivative of ideologies and data that the school can be used; and (3) there can be new researches regarding this study that utilizes strong and stable internet connection for students’ accessibility to see the more significant result of the study.