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.


speed square

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.

speed squares cover

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

3D Cell Models – Go beyond basic plant and animal

I wanted my 7th graders to make cell models this school year, but I didn’t want everyone just making the same thing so I searched the internet for a variety of labeled pictures so that the students could make a variety of cell types.

Bone Cell
Amoeba Cell
Euglena – single-celled Protist (with both plant and animal characteristics)
Plasmodium Cells – protists that cause Malaria
Fat cells
Paramecium – single-cell protist
Budding Yeast Cell
Plant Cell
Nerve Cell

Send me an email at generationscience3@gmail.com if you’d like more information about how I did this activity, including a rubric.