Square feet (length x width).
meter
Meters
meters or yards
I would use a tape measure. This would require one person to help me, since the tape measure would have to be held at both ends. Even if the classroom is longer than the tape measure, I could just mark the full extent of the tape and then measure again from there.
meters
Identify the SI until you would use the measured the width of your classroom
You could use feet or metres.
The metric unit of the meter would be the appropriate measure of the area of classroom. Calculating area involves multiplying the length (in meters) of the classroom's length and width. Area of the classroom would be in square (^2) meters.
Square feet (length x width).
You would use meters.
Use meter sticks to measure the length, width, and height of a lab table or desk in the classroom.
meter
meters
Meters
Centimetre.
Parsecs