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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 x
^{2}-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 x^{2}-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.

## Validate Answers

You can check whether student answers will be scored as correct or incorrect. Enter an answer into the sample answer field [1]. Correct answers receive the full number of points [2].

Incorrect answers receive 0 points.