Development of Assessment-Oriented E-LKPD Media for Learning to Train Mathematical Problem-Solving Skills

The limitations of mathematical problem-solving abilities in students are often caused by the limitations of learning media that are able to provide continuous feedback throughout the mathematical thinking process. The relevant Assessment for Learning (AfL) approach is used to fill this gap because it is based on measuring student learning progress in real-time. The main purpose of this study is to evaluate the feasibility of E-LKPD media designed based on assessment for learning in honing mathematical problem-solving skills in one-variable linear inequality material. The novelty of this research lies in the integration of the principles of Assessment for Learning (AfL) which is equipped with an automated feedback system. The feedback is structured and supports the learning reflection process, so that students can correct mistakes and overcome difficulties independently. This feature is the main differentiator because it is generally not available in conventional E-LKPD. The methods used are research and development (R&D) with the PPE model consisting of Planning (needs and curriculum analysis); Production (storyboard design and product development in wizer.me); Evaluation (validation and trial). This research involved 30 students of grade VIII of SMPN 4 Tasikmalaya as research subjects at the field implementation stage. Theinstruments used in this study include a questionnaire to measure the level of validity and response of students as an indicator of practicality, as well as a ability test to assess the effectiveness of the developed E-LKPD media.Data analysis was carried out quantitatively and qualitatively using Aiken's V as a validity measure, percentage as a practical tool, as well as mean values, N-gain score, and Cohen's d to test effectiveness. The results of the study showed that E-LKPD media obtained the category of "very valid" based on the results of the validation test, with a score of 0.91 from media experts and 0.92 from material experts. Based on these achievements, the developed E-LKPD is declared feasible to be used in the learning process. In addition, this media has also proven to be effective in improving students' abilities, which is shown through a medium category N-gain value of 0.35 and a relatively large effect size value, which is 3.63. From a practical perspective, this research provides solutions for educators in presenting interactive and responsive digital media without having to continue to accompany students. From a theoretical perspective, this discovery reaffirms the effectiveness of an integration of assessment for learning principles in digital emdia as a bridge for students in understanding mathematical problems through continuous feedback.