Interactive Whiteboard Lesson Resource Instructions and Details below.

This learning resource allows the teacher to demonstrate algebraic substitution.  Different values for n can be chosen.  Students can then be asked to come to the interactive whiteboard to input an answer.  The answer can be immediately checked by the resource.

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Buttons
Keypad: To allow entry from the interactive whiteboard the keypad can be used to enter answers.  The computer keyboard can also be used.
n=:  Click the empty rectangle next to n= to select the textbox to enter the value of n to be used.  Clicking this also clears all answers entered so far.
Empty Rectangles: Below each expression is an empty rectangle.  Click this to select which answer to attempt.  Clicking it will clear whatever is already in the box.
Check: After entering an answer the student can click this button to see if the answer was correct.  The cross or tick will illuminate to give the result.