The pandemic has become a concern in the field of education, which has made the conventional learning system switch to online; this means that educators innovate to create innovative teaching materials that access online and offline. The research objectives were to aim for (1) The improvement of student learning outcomes after being taught e-modules; (2) Student learning outcomes that met the minimum competency standards; (3) Student responses to e-modules. This study used test instruments and student response questionnaires. The research sample was 31 students of UNIMED chemistry education class 2020. The results showed an increase in student learning outcomes that achieved the high N-gain criteria of 0.74 and met the minimum competency standard, namely 80, and student responses were 89.04% in the excellent category, so the innovative KKNI-based e-module on oxygen and sulfur materials can be used as a reference for learning resources.

Sistem Keuangan Kacau dapat dimodelkan ke dalam sistem persamaan diferensial non linear model matematika. Solusi dari sistem persamaan diferensial non linear dapat diperoleh dengan metode iterasi. Salah satu metode iterasi yang digunakan untuk menyelesaikan artikel ini adalah Improved Runge Kutta. Metode Improved Runge Kutta Order Tiga ini memperkenalkan istilah baru  , yang di hitung menggunakan  ,   dari langkah sebelumnya dan memiliki jumlah evaluasi fungsi yang lebih rendah daripada metode Runge Kutta. Artikel ini menunjukkan bahwa sistem keuangan kacau dapat diselesaikan menggunakan metode Improved Runge Kutta Order Tiga. Dari hasil perhitungan diperoleh bahwa solusi menggunakan Metode Improved Runge Kutta Order Tiga memiliki solusi yang mendekati solusi RK3