With a ruler? Nope. That's for measuring length.
With a stopwatch? Nope. That's for measuring time!
With a balance? Nope. That's for measuring mass.
With a Newton meter? Why yes! And we measure force in Newtons (N).
Third graders are practicing using Newton meters. Using a Newton meter will help them calculate the net force in various situations where more than one force is acting on an object.