(section: 2 / line: 2)
Yes. Each student may bring in any type of ruler.
(section: 3 / paragraph: a / line: 1)
The materials list contains the equipment (e.g. stopwatch, glassware, etc.) and supplies (e.g. chemicals) used in the experiment. You should include the precision of the measuring device being used (e.g. ruler marked off in millimeters, 250 ml beaker. ) You do not need to list safety equipment, writing implements, calculators, or number of participants helping with the experiment.