What is a Square Root Curve?

A square root curve, also known as a Texas curve, is a grading method used to adjust student scores in a fair and consistent manner. This technique is particularly useful when an exam or assignment proves to be unexpectedly difficult, or when the overall class performance is lower than anticipated. The square root curve takes the original percentage grade, calculates its square root, and then multiplies the result by 10 to produce the curved grade.

This method has the advantage of benefiting lower scores more than higher scores, potentially creating a more equitable distribution of grades across the class. For example, a student with an original grade of 25% would see their score increase to 50% after applying the square root curve, while a student with an original grade of 81% would only see their score increase to 90%.

How to Use the Square Root Curve Calculator

Step 1: Access the Calculator

Navigate to the Square Root Curve Calculator page in your web browser. You’ll see a simple interface with an input field and a “Calculate Curved Grade” button.

Step 2: Enter the Original Grade

In the input field labeled “Enter Original Grade (%),” type in the original percentage grade you want to curve. This should be a number between 0 and 100, and can include decimal places for precise grading.

Step 3: Calculate the Curved Grade

Click the “Calculate Curved Grade” button. The calculator will instantly process your input and display the results.

Step 4: Review the Results

The calculator will show you both the original grade and the curved grade. It will also provide a brief explanation of how the curved grade was calculated.

Step 5: Understand the Grade Comparison Table

Below the calculator, you’ll find a Grade Comparison Table. This table keeps track of your calculations, showing the original grades and their corresponding curved grades. This feature is particularly useful if you want to compare multiple grades or see how different original grades are affected by the curve.

Step 6: Repeat as Needed

You can use the calculator multiple times to curve different grades. Each new calculation will be added to the Grade Comparison Table, allowing you to see up to 10 different grade calculations at once.

Step 7: Interpret the Results

Remember that while the square root curve can help adjust grades, it’s important to consider the context of the original assessment and the overall class performance when interpreting the results. The curved grade should be used as a tool for fair grading, not as an absolute measure of student performance.