pendulum:

string, tape, weight, ruler

does the period depend on length? how?
	measure 5 periods, repeat 3-5 times for a given length
	do several lengths.
	table, plot. how does it relate?
	
does the period depend on weight?
	try same length with 2 different weights
	
went well, relatively free-form

did not do: linearize. turns out for such a short range of lengths the plot is basically linear already. BUT, use this to caution that the general relationship is not a straight line, it only looks that way due to tiny range of measurement. What you found is only valid for the range of measurement.