Effects of multiple representations-based instruction on junior high school students’ achievement in linear equations in one variable

The study investigated teachers' mode of representations in linear equations in one variable, what accounts for teachers' choice of representations and students' representations preferences and effects of multiple representations--based instruction on studStud' achievement in linear equations in one variable. A quasi- experimental design was used with a sample size of 86 mathematics teachers and 159 students ( students in Junior High School 2) selected through purposive and convenient sampling technique respectively in the Bimbilla Municipal in the Northern Region of Ghana. The research instructions included: linear equations achievement test (pretest and post test, questionnaire, representations preference test ( RPT) and interview guide. The  data collected we're analysed quantitatively and qualitatively. It was found that most teachers (66.3%) used algebraic expression everytime on teaching linear equations while few teachers used manipulatives, graphic and multiple representations due to reasons such as time, difficulty for students, lack of materials, lack of ideas,no relevance and many more. It was also found that most students 59(37.1%) had  preferences for algebraic representation citing similar reasons of their preferences as what accounted for teachers' choice. The analysis of Covariance (ANCOVA) revealed a statistical significant difference between students' scores in linear equations achievement test in favour of multiple representations-based instructions, F(2,155)=10.20, P 0.05, n^2= 12. The major recommendation is that, multiple representations--based instruction should be used during instruction as well as improving teachers' knowledge on how to integrate untamunfam representations easily in linear equations in one variable.