# Unit Confusion SOLVED!

Many of my students struggle with solving basic physics formula, and most of all, in understanding which units go with the answer to the question being asked.

Is this familiar to you… The question ask for “HOW LONG does it take for the skateboarder to roll 25 meters while moving at 2 m/s?”, and the student answers 12.5 m/s!!!

Students MIGHT use the right equation (time = speed/distance) , but the answer nearly NEVER has the right units – the question is about time or distance and no matter what the student puts “m/s” as part of the answer! Mind boggling to one degree, but this is all new for them and it’s normal to have trouble applying old skills to new problems.

PROBLEM (nearly) SOLVED! The first formula is use in my 8th grade physics class is the equation for speed (or velocity). I have found that by guiding my students through the process of choosing the formula, writing the formula, and forcing them to pay attention to the units involved through this graphic organizer, greatly improves their success!

See MORE about SPEED SQUARES here. I also have created DENSITY SQUARES and I’m working on making resources for all of the formulas I use in my science classes.