Good: I keep everything the same except for the one thing I am testing, I think carefully about the one thing I am testing, I plan experiments to find facts, I have evidence to prove my ideas, If I am unsure, I carefully run my experiment again, Bad: I keep most things the same but change a couple of things, I rush my experiment to finish it quickly, I play with things and think about what it means later, I make guesses that sound right, If I am unsure, I make things up,

S1 U1L3 Experimental design

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