Search Results       Your search for [author]Doblada, Vivencio Matematico. returned 1 record.           The effect of enrichment activities on the performance of fourth year high school students in trigonometry. by Doblada, Vivencio Matematico.; 2007. Subject: Trigonometry -- Ability testing; High school students -- Rating of.          Add to Book Cart Relevance: 34.36%