Standards, standards, everywhere

I chose to evaluate how the NCTM standard of “understanding relationships among units and convert from one unit to another within the same system” compares with a similar standard in the Common Core and CMP standards. For the most part all three standards cover essentially the same thing. However, there are several differences between the three standards.  One is that the Connected Math Project standards include conversion between customary and metric systems whereas the Common Core and NCTM standards keep the conversions within the same system. Another difference is the NCTM and CMP consider converting measurements a sixth through eighth grade skill where the Common Core standards place it in the fifth grade classroom. Lastly, the common core standards are the only ones that explicitly state that the skill must be implemented in multi-step, real world problems, which is surprising to me since that seems to be one of the main objectives of the Connected Math Projects standards. While the standards do not match up identically one to one, creating multi-step, real world measurement problems that include converting between customary and metric systems would easily cover all three sets of standards.