Checking student input

Questions
1

I am attempting to check if a student enters the correct response for a pythagorean theorem problem. Right now I am using the code:

ans=simpleFunction("\sqrt{a^2+b^2}",“a”,“b”).evaluateAt(exp6.numericValue,exp7.numericValue)

correct: exp10.numericValue=ans

This code works fine if the answer is a perfect square! It does not work if the answer is irrational . Suggestions on how I can handle this? I would like it to tag the answer as correct if the student enters the EXACT value as a square root into the input box.

2

You can either round both the answer and the key to a few decimal places or check for exact latex if you are concerned about simplest radical form. Both methods have advantages and drawbacks

3

Thanks Jay. What is the best way to round values in CL? I assume its simpleFunction but that does not seem to work. I am using this set of commands to first calculate the answer and then round that answer. I copied the Latex for the round command directly from Desmos.

ans=simpleFunction("\sqrt{a^2+b^2}",“a”,“b”).evaluateAt(exp6.numericValue,exp7.numericValue)

round=simpleFunction("\operatorname{round}\left(k,2\right)",“k”).evaluateAt(ans)

4

I was able to solve my problem. It looks like when I copied the ‘round’ command from Desmos, I got too many symbols. Namely the ‘\left’ and ‘\right’.

The commands below successfully check a students answer to two decimal places based on the previous inputs exp6 and exp7.

ans=simpleFunction("\sqrt{a^2+b^2}",“a”,“b”).evaluateAt(exp6.numericValue,exp7.numericValue)

round=simpleFunction("\operatorname{round}(k,2)",“k”).evaluateAt(ans)

1 Like
5

Here is the completed activity I was creating with this functionality.

2 Likes
6

I am trying to have the students find the percent error of a number and then it tell them if they are correct. I am missing the coding for determining if the student is correct and any help in this area would be awesome.