Today, James and I worked through some of the ways to identify variables in word problems, cross multiplication for determining ratios and equivalent fractions. James also decided to diverge from math to look at several subjects in science. We discuss ions (i.e. charged particles) and their relationship to atoms. We also looked at the definitions of atomic number and atomic mass, and how this relates to density. James discussed difficulty in understanding the use of beakers and measurement devices and way to use math to find equivalent proportions for science and other purposes. This was related to our work on ratios. I will work to prepare some simple yet effective problems regarding the use of ratios and units of measure in science and their relationship to many fields of study (ex. cooking, engineering, etc...)