This study explored the use of Electronic Strategic Intervention Material (E-SIM) in Science 8 for the fourth quarter of the school year 2019-2020. The application of the material is important towards achieving the needed competencies of the students which they failed to achieve in a typical classroom instruction. 20 of 68 Science 8^th Grade students were identified least mastered in the competency of Mendelian Genetics Dihybrid Cross during formative assessment. Furthermore, these students experienced difficulties in Solving Mendelian Dihybrid Cross using Punnett squares, and interpretation of genotypic and phenotypic ratios are also considered hurdles in learning and understanding basic genetics. With theme “No learners will be left behind” these 20 students were subjected as respondents. A pre-test and post-test were conducted to measure the respondents’ scores. During the pre-test the overall percentage of the respondents valued at 28.75% classified as “Not Mastered”. After the results were generated an strategic intervention material entitled “Finding Probability” was introduced that would help develop mastery in solving Mendelian Genetics Dihybrid Cross using E-SIM and most importantly to obtain the percentage of increase of the respondents and it showed a significant increase of 75.25% classified as “nearly mastered”. The percentage of increase obtained a value of 45.5%. On the other hand, the result of the study implies that the majority of the respondents manifest an increase of scores after the intervention was introduced. The positive result of the respondents suggested that the application of E-SIM was appealed and appreciated to both types of learners.

Intervention material, Mendelian genetics