Lab 7 Discussion About Choices

Choice 1- Approach Generate problems Solve problems entered by students Teach students how to work with fractions

Choice 2 – Presentation Format Menu Required sequence of things to do

Choice 3 -Operations to implement Addition needs two operands needs common denominator needs to reduce answer needs to know how to add Subtraction needs two operands needs common denominator needs to reduce answer Multiplication need to reduce needs two operands Division need to invert and multiply needs two operands

Helper Operations Needed common denominator –can get by multiplying two denominators least common denominator swap numerator and denominator – for division reduce (i.e. put in lowest terms) –find common factor of numerator & denominator –divide each by that common factor

Choice 4 - Interface Java options pane Text

Problems to address Denominator entered by student is 0 Number is entered as a mixed number How will fraction(s) be entered? Numerator and denominator String

Terminology Here is a chart showing words used by students in creating the Fractions design/program and providing alternate words that a public school teacher would have used with her class. U:\Web\CS239\Lectures\Lecture8\Teacher_ Words.htm