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Authoring Numeric/Expression questions

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Grading and Evaluation of students work is always a challenge to teachers.Automatic grading with any grading software will help but is limited to Multiple choice, Multiple selection or True/ False questions. What about  a complex situation where a question has a solution which might be expressed in multiple ways?  

Let us first start with authoring of the question and understand how complex situations are handled.

To author a numeric question type, enter the question text in the question text box. Key in the answer using the math editor and click on ‘Accept answer.’ You can choose to have an alternate answer added as well, if needed. 

 

Numeric question types allows the anwer to be expressed in numeric, decimal, fraction (proper, improper and mixed) and percentage form.

**No division, multiplication operations or numerical expressions allowed.

Consider the following example to see how the evaluation is done:

Question: John has 10 items in his backpack, including 6 books. What is the  probability that a randomly selected item from his backpack is a book?

Answer Key: 6/10

To grade this question the software should consider all the possible answer keys that are mathematically correct. Credit to be given for all the following responses:

Other keys: “3/5”, “0.60” and  “.60” ...

The student can be forced to input the answer key in a specific form but the problem doesn't end here. It misleads student by believing that their equivalent response is incorrect. Edulastic does it “all”. The system considers all possible equivalent responses to the answer key and marks them correct.

A similar problem arises when there are numerical and algebraic expressions.

Let us first start by authoring an Expression Evaluator question type.

Enter the question text in the question text box. Key in the answer using the math editor and click on ‘Accept answer’. You can choose to have an alternate answer added as well, if needed.

 

Settings:

If the expression in the answer has a variable, add them in the allowed variable.

Set the Math Toolbar option to Basic, Intermediate, Advanced and Full to display the tools as needed.

Consider the following example to see how the evaluation is done:

Question: Write the function that is represented in the following set of data:​

Key:  “2/5x+1”, “.4x+1”, “0.4x+1” “(.4x+1)”, …..

 

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