# Timed test: when time has elapsed, lock table

**URL:** <https://cl.desmos.com/t/timed-test-when-time-has-elapsed-lock-table/7939>\
**Category:** Questions\
**Created:** [May 21, 2025, 1:09am UTC](https://cl.desmos.com/t/timed-test-when-time-has-elapsed-lock-table/7939 "2025-05-21T01:09:53Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Poovandrie\_Jansen](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/poovandrie_jansen/32/5002_2.png) [@Poovandrie\_Jansen](https://cl.desmos.com/u/Poovandrie_Jansen)\
**Post date:** [May 21, 2025, 1:09am UTC](https://cl.desmos.com/t/timed-test-when-time-has-elapsed-lock-table/7939/1 "2025-05-21T01:09:54Z")

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I am trying to create an activity to identify my students’ strategies to retrieve addition/multiplication facts. I want to use a timer , since this is an indicator of whether they use counting on to retrieve facts. I would use the data to review in small group efficient (addition strategies)ways to retrieve facts.  
My question is: once the time has elapsed.. how could I lock the table to force students to move to the next slide? I have spent countless hours in cl. desmos,com trying to find a solution.  
Besides looking, my skills are limited..  
!

 ![image](https://canada1.discourse-cdn.com/flex031/uploads/desmos/original/2X/7/7fba177ccd13da068148b3201c9ea4821eb48b45.png)

I want something that looks like this when the timer reaches 0 seconds. Taken from an activity from: [Copy of] Stopping a timer when all questions are correct  
By David BUSHEdited

 ![Screenshot 2025-05-20 210619](https://canada1.discourse-cdn.com/flex031/uploads/desmos/original/2X/b/b656b3faf4afb21f546e18533f6352c7e2483c34.png)

Thanks for helping out

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<div class="post-metadata">

**Author:** ![David\_BUSH](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/david_bush/32/787_2.png) [@David\_BUSH](https://cl.desmos.com/u/David_BUSH)\
**Post date:** [May 25, 2025, 9:08am UTC](https://cl.desmos.com/t/timed-test-when-time-has-elapsed-lock-table/7939/2 "2025-05-25T09:08:39Z")

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Hi @Poovandrie_Jansen , I locked the table cells like this when the timer expired

```auto
cellEditable(1,3): Timer.script.timeLeft>0

```

I needed a separate statement for each row of the table, which is a bit cumbersome.  
See [Increasingly Difficult Differentiation](https://teacher.desmos.com/activitybuilder/custom/61a1353f260d0a0a0bc20087) which is designed to test students fluency with differentiation.  
It’s **not** perfect and if students move off screen 1 after pressing the Start button then the `timeSincePress` sadly fast forwards to the maximum.  
I should find a way to disable the new `Done` button that has appeared in Desmos recently as I suspect that will also impact running timers.  
I’ve heard in the forum that there is a `hideNextButton` feature that you can add to a screen, but there isn’t any CL documentation for it yet ☹

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<div class="post-metadata">

**Author:** ![Poovandrie\_Jansen](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/poovandrie_jansen/32/5002_2.png) [@Poovandrie\_Jansen](https://cl.desmos.com/u/Poovandrie_Jansen)\
**Post date:** [June 3, 2025, 10:03pm UTC](https://cl.desmos.com/t/timed-test-when-time-has-elapsed-lock-table/7939/3 "2025-06-03T22:03:32Z")

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Thank you .. I appreciate this

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<div class="post-metadata">

**Author:** ![Poovandrie\_Jansen](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/poovandrie_jansen/32/5002_2.png) [@Poovandrie\_Jansen](https://cl.desmos.com/u/Poovandrie_Jansen)\
**Post date:** [June 4, 2025, 11:07pm UTC](https://cl.desmos.com/t/timed-test-when-time-has-elapsed-lock-table/7939/4 "2025-06-04T23:07:38Z")

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Wow that worked perfectly.. thank you.

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<div class="post-metadata">

**Author:** ![David\_BUSH](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/david_bush/32/787_2.png) [@David\_BUSH](https://cl.desmos.com/u/David_BUSH)\
**Post date:** [June 5, 2025, 8:08am UTC](https://cl.desmos.com/t/timed-test-when-time-has-elapsed-lock-table/7939/5 "2025-06-05T08:08:18Z")

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You’re very welcome. Glad it worked

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<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/desmos/original/2X/f/f5bd144684474e9a2f333002cde9840e52c5dbd3.png) [@system](https://cl.desmos.com/u/system)\
**Post date:** [June 7, 2025, 8:08am UTC](https://cl.desmos.com/t/timed-test-when-time-has-elapsed-lock-table/7939/6 "2025-06-07T08:08:43Z")

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Closed on June 7, 2025, 8:08am UTC

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