Problem-solving is a complex process that is helpful in our day-to-day life and is also crucial in the teaching and learning process related to Science and Mathematics fields.  This study aimed to assess the effectiveness of content-based problem solving instruction in Mathematics among the Grade 2 learners with the end view of crafting a plan of action based on the findings. The specific questions answered consisted that of the extent the teachers used content-based instruction approach in teaching problem solving in Mathematics in terms of theme-based approach, team-teach approach, and skill-based approach, the extent the learner demonstrates content-based problem solving skills in Mathematics, the extent of effectiveness of content-based instruction in Mathematics problem solving, and the plan of action proposed on the use of content-based problem solving instruction in Mathematics. This study employed the use of descriptive quantitative research method with questionnaire as the main data gathering instrument. The population utilized in the study are the Grade 2 Mathematics teachers from Malvar District Division of Batangas public elementary schools. A total of 113 Grade 2 Mathematics teachers were asked to participate in the study. Findings consisted that of the teachers use content-based instruction in teaching problem solving in Mathematics in terms of theme-based approach, team-teach approach, and skill-based approach to a high extent, learners demonstrate content-based problem solving skills in Mathematics to a high extent, the The effectiveness of the use of content-based instruction is very satisfactory as evident with the academic performance of the learners, and the output of the study which is a proposed plan of action is crafted based on the findings of the study. Recommendations included that for the Mathematics teachers may be able to look for the best practices in the use of content-based instruction to find out what works best for the learners when it comes to problem solving in Mathematics, and for the future researchers may validate the output of the study which is a proposed plan of action in using the content-based instruction in Mathematics.

content-based instruction

theme-based approach

team-teach approach

skill-based approach

proposed plan of action