| 1. |
Write the value or expression to
be substituted on a Post-It note with a heavy black marker
(so that it can be seen by the class).
|
| 2. |
You may need several Post-It
copies of the same value, as seen in this problem. Start by piling all of the copies on top of one another
next to function
 .
As you start your substitutions, grab one copy and place
it in its proper location in function
and continue until all of the necessary substitutions have been made. Emphasize that you are replacing the x-values
in function
with the Post-It note value or expression.
|
| 3. |
Place the Post-It note carefully
in the problem so that any operations to be performed on the value or expression can still be seen.
When dealing with expressions, emphasize to students that the Post-It
note expression must be treated as an entire quantity. Proceed
with simplifying the expression.
|
| 4. |
Showing this process once is
usually sufficient. In future problems, simply "grab" at the value to be substituted with your hand and state
"remember, it is like pasting a Post-It note copy." |
represents a Post-It note.