Students Activities on Law of Sine Reinvention
Agung Anggoro (a*), Endang Mulyana (b)
(a) Mathematics Education, School of Postgraduate Studies, Universitas Pendidikan Indonesia Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
(b) Department of Mathematics Education, Faculty of Mathematics and Sciences Education, Universitas Pendidikan Indonesia Jl. Dr. Setiabudhi No. 229, Bandung 40154, Indonesia
Abstract
This qualitative study aims to investigate students- responses on a constructed didactical design which is aimed to reinvent the law of sine. The participants are 30 students. We constructed a didactical design including the activities steps and the prediction of student responses which are consists of expected and unexpected responses. We also prepared the anticipation for each unexpected responses. From the didactical design implementation, we obtain: 1) some students performed similar responses with our prediction in some section; 2) some students performed unpredicted responses in some section, so we need to perform unplanned anticipations; 3) some students performed unpredicted responses but there are the ‘different but equivalent expression- with the predicted responses, we still need to perform the different anticipations. The other result of this study is a revised didactical design.
Keywords: Didactical design; student responses; anticipations; law of sine
Topic: Mathematics Education