Measure length using a ruler marked with halves and quarters of an inch with Ms. Askew. Join Ms. Askew for a fun Fraction Number Talk. We'll measure length using a ruler marked with halves and ...

If you need to use a ruler for any of our lessons and activities, please feel free to print and use this resource. Cut it out, tape it to something more rigid (like a stick) and start measuring away!

You’re not going to exactly want to replace your tape measure, but as far as iPhone hacks go, this is about as cool as it gets: Acoustic Ruler allows you to measure distance up to 82 feet using a ...

The cosmic distance ladder is the world’s longest ruler, built to measure the universe. Since the time of the ancient Greeks, scientists have been constructing a cosmic measuring tape to measure the ...