A measuring tape or a laser distance measurer would be suitable tools to measure the height of a ceiling.
80 millimeters
there about 61 to 84 children in a classroom
Ceiling of Sant'Ignazio Church (Roma) by Andrea Pozzo, 1691-1694
5 through 6 computers average in 1 regular classroom and if in gifted or magnet 10 through 15 average in 1 classroom.
There is no set standards
Meters works well, so do centimeters
13.7 millimeters
1 meter = 1,000 millimeters 2 meters = 2,000 millimeters 3 meters = 3,000 millimeters . . . 6,384 meters = 6,384,000 millimeters
Average ceiling height
Ceiling height varies, 8'3" and up
2m
The Elmo is great for classroom use, especially mounted on the ceiling.
The SI unit that would be used to express the height of your classroom ceiling is meters (m). The meter is the base unit for length in the International System of Units (SI) and is commonly used to measure distances and heights. When measuring the height of a ceiling, it is important to use a precise instrument such as a tape measure to obtain an accurate measurement in meters.
Height = 1000/(pi*42) = 19.89436769 mm
The standard ceiling height is 8 feet.
1,676.4 millimeters.