More specifically, the data (Click here for footnote 9.) show that students who were not proficient at decimals, fractions, and roots in the 8th grade were equally likely by the 10th grade to be proficient on these items and on simple and complex problem solving regardless of whether they took geometry, algebra II, trigonometry or precalculus. Additionally, students who took these courses were five times more likely to be proficient in simple and complex problem solving than those who took only algebra I. On the other hand, students who were already proficient in simple problem solving in the eighth grade were significantly more likely to be proficient in advanced problem solving if they took trigonometry than if they took algebra I, geometry and/or algebra II. (See figure 1-5.)
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