Checking Correctness of Table Entries

[JMINTURN]

Hi cwinske,

You helped me out a couple weeks ago, simplifying my code and I was wondering if you could help me with the the code in slide 1

https://teacher.desmos.com/activitybuilder/custom/5ebac05f69633c0c38c58f13

Thanks in advance,

John

[cwinske]

You bet. In the sketch, type this: readOnly: true.

For this input, try this:

correct = firstDefinedValue(this.numericValue=80)

correct: correct

suffix: "degrees"

This allows for a label but also will ignore if a student attempts to type “degrees.” I would try to avoid checking latex because extra spaces will automatically cause the problem to be incorrect.

[JMINTURN]

Thanks so much!!!

If you don’t mind me asking… to avoid using latex, how would you go about coding for question 3 (slide 3)?

You’ve so helpful!

[cwinske]

You’re welcome! I would use parseEquation for that one. Add this to the input (don’t forget to mark the sketch as readOnly):

correct = parseEquation(this.latex).differenceFunction("w").evaluateAt(52)=0

correct: correct

The parseEquation reads the latex as an equation and the difference function subtracts the left side and the right side of the equation. Since there should be a “w” variable, if we substitute 52, the difference should be 0. This will allow for different iterations of the equation too i.e. w+w+76=180.

You could also toss in an errorMessage to make sure the correct variable is being used. This goes in the input too.

ev1 = simpleFunction(parseEquation(this.latex).lhs, "w").evaluateAt(52)
ev2 = simpleFunction(parseEquation(this.latex).rhs, "w").evaluateAt(52)

errorMessage: when isUndefined(ev1) or isUndefined(ev2) "Only use the w variable" otherwise ""

[Daniel_Grubbs]

Could you alternatively have a variable for the differenceFunction, then use that for both the correctness check and for the undefined check?

d=parseEquation(this.latex).differenceFunction("w").evaluateAt(52)

correct: d=0
errorMessage: when isUndefined(d) "Only use the w variable" otherwise""

[cwinske]

I was trying to do something like that, but couldn’t get it to work. That looks like it should do the trick.

[JMINTURN]

You’re AMAZING!!!

Do you ever put on any clinics or is there a book that has all these commands and what they do? How did you learn all this? I really enjoy creating these activities and want to learn more.

I have one last question for now… how about code to check an expression?

https://teacher.desmos.com/activitybuilder/custom/5ebbff9ec3459f0c74b3fea6

[cwinske]

I learned from @Jay! I started by doing the CL scavenger hunt and then just kept learning by making activities. There are webinars that @jay has hosted that are archived somewhere in this forum.

For your question, don’t forget to mark the sketch as readOnly: true. For the input, try this:

correct = simpleFunction(this.latex, "a", "b").evaluateAt(5,5)=5 and countNumberUsage(this.latex,2)=1 and countNumberUsage(this.latex,3)=1 and countNumberUsage(this.latex)=2

For the evaluateAt, I just chose to sub 5 for a and b, which happens to evaluate to 5. You can pick other numbers too. I also look for one 3, one 2 (countNumberUsage only looks for positive values), and two numbers total.

[Daniel_Grubbs]

The @Jay’s webinars are in the Announcements section, but here’s all 5:

Introduction to the computation layer webinar #1

The recording of the first webinar in this series of 5 can be found here: https://drive.google.com/file/d/14sHOLnvYvoixMyZZHPSdnwHroiLoXTSl/view Webinar #1: Introduction Learn how to set up your account to access the computation layer Learn the basic navigation with the computation layer turned on Be introduced to strategies for scripting in this language

Introduction to the computation layer - Webinar #2

Here’s the link to the recording of the second webinar held on 2/6: https://drive.google.com/file/d/1K3BLLN9wJIfZ9fNHXmvubbnFNKlqfLKV/view?usp=sharing Working in Graphs: Acquire some prerequisite skills in graphs alone in order to apply the computation layer Learn how to enter equations in various forms into inputs and tables and have them show in a graph display Learn how to enter coordinate points into an input field and have it show in a graph display Animation in the graph display using t…

Introduction to the Computation Layer - Webinar #3

Here’s the temporary home for the third computation layer webinar: We’ll look into more accessible locations eventually but for now you can count on them being housed here. Webinar #3 - Aggregation (+ surprise guest) Learn how to take student inputs and compile them into a list. Learn different ways of displaying the class data for students to see on their own screens. Make use of the brand new Desmos Statistics tools! Special Guest - Justin Brennan Make your own graphing stories by up…

Introduction to the Computation Layer #4

Here’s the link to the fourth webinar: https://drive.google.com/file/d/1q6uQTWUS9SuzDLP9qdVEo7dLtGOdIqiI/view?usp=sharing In this Webinar: Learn about the correctness sink Learn how to make a piecewise function evaluate conditions in a graph Challenge yourself with different ways of showing correctness in a graph. HOMEWORK for webinar #5: Send me something that you would like to have correctness applied to. I will try to work through as many examples as I can during our time…

Introduction to the Computation Layer #5

Here’s the recording to the last CL webinar: In this session: Learn how we can sample points to match functions for correctness Learn how to build functions and concatenate inputs using CL Learn about tolerance (in computation) and how to apply it to your correctness functions.

[Jay]

Yep! We’re also running clinics by appointment:

Computation Layer Team

And hosting webinars daily:
https://learn.desmos.com/webinars

(for a limited time)

[JMINTURN]

Cwinske,

I have quick follow up for you about this code for checking an equations most of my students wrote down the correct equations which was 2x+76=180, but I had a kid write w=52, which is technical correct but I was hoping to have it in a form “something” = 180 (or 180 = “something”) Do you have any suggestions on how to get it in that format?

[Daniel_Grubbs]

Include something like this

correct = countNumberUsage(parseEquation(inputName.latex).lhs,180)=1 or countNumberUsage(parseEquation(inputName.latex).rhs,180)=1

or if you just want to check for the 180
correct=countNumberUsage(inputName,180)=1

[Jay]

That will just count the numbers on either side. You want to make sure that the side evaluates to 180 always. SimpleFunction on both sides checking that it’s evaluated amount always comes out to 180 should do it.

[Daniel_Grubbs]

I just meant in addition to his current check, and was just answering how to check for the “=180”.

[Jay]

Perfect. The complete line of code shared made it seem like a complete check.

[willow01nb]

Here is an activity where students can either click to drag labels to the correct spots in an image (slide 2) or, where they can enter the correct text label name into a table (in slide 1).

In the table in slide 1, how does the code need to change so that the 3rd column shows a green checkmark when the correct text is entered in the proper cell of the table? Also, is there any way to get the “cell content” command to disregard whether the student puts a word in as uppercase or lowercase? (I will just include in the directions to use all lowercase if not).

By the way, when I get rid of the word “when,” an error occurs.

Drag Points to Label Objects on an Image • Activity Builder by Desmos

Code used:
cellContent(1,3): when table1.cellContent(1,2)= “label 1 name here” “” OTHERWISE “N”

Thanks for any help.

[Daniel_Grubbs]

For slide 1, you need to change “label 1 name here”, “label 2”, etc. to whatever correct answer you’re looking for. You can add an or in to include capitalized.
Here, my intended label is “frog”:

cellContent(1,3): when table1.cellContent(1,2)= "frog" or 
         table1.cellContent(1,2)= "Frog" "✅" otherwise "N"

[willow01nb]

Thank you. Is it true you cannot have “spaces” in your cell content for the check mark to register- such as in label 2? If I change it to “frog height,” the check mark does not appear, but if I change it to “frog,” it does appear. If so, is there a way to trigger the checkmark for responses that have spaces in them?

[willow01nb]

Oh I see- I would need to put a second column in the table if there is a second word. Thank you.

[willow01nb]

As a note, when I did enter a second column in the table (it is now on slide 7, for the 4th row in the table), it is not picking up that “ground” in the first column and “water” in the second column is correct. I am not sure why.