## How do I use the isExpanded mathematical scoring method when creating a math item?

When you create a math item in Mastery Connect, you can select one of the available mathematical scoring methods. The isExpanded scoring method checks that the expression entered by a student is in its most expanded form. For example, if a student's response is 2(x+y), it is scored as incorrect because the expression is not in an expanded form of 2x+2y. Refer to additional examples below.

Notes:

• The isExpanded scoring method works with polynomials up to the second degree.
• The isExpanded scoring method works with decimals and variables.
• You can combine the isExpanded scoring method with other scoring methods, such as the equivSymbolic scoring method.

## Create Math Item

Create or edit a math item. Learn more about creating a math formula item, image cloze math formula item, or cloze math formula item.

Enter a question stem in the Compose question field [1]. You can also enter a formula template [2].

## Select Method

Enter a point value for the item in the Point(s) text box [1].

In the Set correct answer(s) section, click the Method drop-down menu, and select the isExpanded option [2].

Note: To view the Method drop-down menu, you may need to click the response Expand icon [3].

### Allow Different Separators

By default, a dot is allowed as a decimal value separator and a comma is allowed as a thousands separator. To allow different separators in student responses, click the Allow decimal marks checkbox [1].

To specify a decimal separator, click the Decimal separator menu [2], and select the Dot or Comma option.

To specify a type of separator for thousands, click the Thousands separator drop-down menu [3], and select the Dot, Comma, or Space option.

Note: You cannot select the same option for both the Decimal separator and the Thousands separator. For example, you cannot select Dot for both.

## Examples

Any student response that is in factored form is scored as correct. Otherwise, it is scored as incorrect.

• A student response of 3x is scored as correct with the isExpanded scoring method.
• A student response of 34 is scored as correct with the isExpanded scoring method.
• A student response of x2-3x-10 is scored as correct with the isExpanded scoring method.
• A student response of 3+5 is scored as incorrect with the isExpanded scoring method.
• A student response of (x-5)(x+2) is scored as incorrect with the isExpanded scoring method.

You can combine the isExpanded scoring method with the equivSymbolic scoring method. For example, if you set the correct answer to x2-3x+2 using the equivSymbolic method, and then add the isExpanded method, a student response of (x-1)(x-2) is scored as incorrect. Although it is symbolically equivalent to the correct answer, it is not in expanded form.