Randy thoughts on IVDV
Intro table
1) Introduce table, and highlight that some things changes, some things don’t change in each try.
Constants and Variables
2) Here’s an experiment… what things change? What things remain the same? Feedback: Right! Scientists call the things that don’t change, constants, and the things that change variables.
3) Here’s an experiment… what are the constants? What are the variables (a few rounds… first in table, then drag pictures, then drag text, then answer multiple choice).
Other concepts to sneak in… things don’t stay the same by accident, the experimenter makes sure they stay the same.
IV and DV Variables (2 caves)
4) Here’s an experiment… what are the constants and variables? Right… OK, let’s look at the ones that are changed. One is the cause and one is the effect. (a few rounds… first in table, then drag pictures, then drag text, then answer multiple choice).
5) Introduce the same thing, that another way to think of it is one is the one I change, we call that independent variable (a few rounds… first in table, then drag pictures, then drag text, then answer multiple choice).
Overall concept to emphasize There are two kinds of change… one thing changes because we make it change… the other thing is the one that changes as a result… the constants are things the experimenter makes sure does not change.
He said not to worry about showing no change experiment.
The independent variable is what the experimenter changes on purpose.
Other notes: don’t use the plank as a variable. He’s going to give us 40 new experiments.
1) Introduce table, and highlight that some things changes, some things don’t change in each try.
Constants and Variables
2) Here’s an experiment… what things change? What things remain the same? Feedback: Right! Scientists call the things that don’t change, constants, and the things that change variables.
3) Here’s an experiment… what are the constants? What are the variables (a few rounds… first in table, then drag pictures, then drag text, then answer multiple choice).
Other concepts to sneak in… things don’t stay the same by accident, the experimenter makes sure they stay the same.
IV and DV Variables (2 caves)
4) Here’s an experiment… what are the constants and variables? Right… OK, let’s look at the ones that are changed. One is the cause and one is the effect. (a few rounds… first in table, then drag pictures, then drag text, then answer multiple choice).
5) Introduce the same thing, that another way to think of it is one is the one I change, we call that independent variable (a few rounds… first in table, then drag pictures, then drag text, then answer multiple choice).
Overall concept to emphasize There are two kinds of change… one thing changes because we make it change… the other thing is the one that changes as a result… the constants are things the experimenter makes sure does not change.
He said not to worry about showing no change experiment.
The independent variable is what the experimenter changes on purpose.
Other notes: don’t use the plank as a variable. He’s going to give us 40 new experiments.
posted by Pamela at 9:10 AM
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