This study is an attempt to analyze students' construction of function based problem solving methods in introductory algebra. It claims that for functions to be a main concept for learning school ...

Differential equations are fundamental tools in physics: they are used to describe phenomena ranging from fluid dynamics to general relativity. But when these equations become stiff (i.e. they involve ...

When you add, subtract, multiply or divide mass in grams and kilograms, sometimes you need to convert the measurements so that they are in the same unit. To convert from kilograms to grams you ...

The mathematical performance of 250 U. S. sixth-grade students from both private and public schools and 425 Chinese sixth graders from both key and common schools was examined on multiple-choice tasks ...