# \#csa-unit-4 **URL:** https://forum.code.org/tag/csa-unit-4/449.md [Latest](https://forum.code.org/latest.md) · [Categories](https://forum.code.org/categories.md) · [Tags](https://forum.code.org/tags.md) --- ## [Unit 4: Lesson 19: Integers and Doubles](https://forum.code.org/t/unit-4-lesson-19-integers-and-doubles/41878)
**Author:** [@jeff.rhodes](https://forum.code.org/u/jeff.rhodes)\ **Replies:** 1\ **Last updated:** [March 20, 2026, 8:12pm UTC](https://forum.code.org/t/unit-4-lesson-19-integers-and-doubles/41878 "2026-03-20T20:12:16Z")
On Lesson #6 C, I keep getting a fileReader error, but the example solution, which is the exact same, does not throw the error. I already emailed code.org, just wanted to see if anyone else ran into this issue and has a… --- ## [CSA Unit 4 Lesson 4](https://forum.code.org/t/csa-unit-4-lesson-4/41556)
**Author:** [@rsatija](https://forum.code.org/u/rsatija)\ **Replies:** 1\ **Last updated:** [November 20, 2025, 3:19pm UTC](https://forum.code.org/t/csa-unit-4-lesson-4/41556 "2025-11-20T15:19:08Z")
Unit 4 - Lesson 4: Casting and Rounding Can we add something about rounding in slides, video, and the lesson? It is only about casting there. Thanks, --- ## [Supplies needed for units 4, 5, & 7](https://forum.code.org/t/supplies-needed-for-units-4-5-7/41019)
**Author:** [@twade](https://forum.code.org/u/twade)\ **Replies:** 1\ **Last updated:** [June 7, 2025, 6:09am UTC](https://forum.code.org/t/supplies-needed-for-units-4-5-7/41019 "2025-06-07T06:09:37Z")
I am teaching Units 4, 5 & 7 for the first time this year. Are there any supplies I might need to request from students while teaching this unit? It would be helpful to know ahead of time in order to plan. We send supply… --- ## [CSA 4.8 DeMorgan's Answer Key, Station D](https://forum.code.org/t/csa-4-8-demorgans-answer-key-station-d/40299)
**Author:** [@slwilke](https://forum.code.org/u/slwilke)\ **Replies:** 2\ **Last updated:** [January 16, 2025, 1:35am UTC](https://forum.code.org/t/csa-4-8-demorgans-answer-key-station-d/40299 "2025-01-16T01:35:32Z")
I was looking over the answer key to Unit 4, Lesson 8, DeMorgan’s and I found a curious issue. Depending upon how the student bracket out the parts of the equation, they will get two different end results for Station D.… --- ## [Unit 4: Abstrat Art Issue](https://forum.code.org/t/unit-4-abstrat-art-issue/40236)
**Author:** [@jeff.rhodes](https://forum.code.org/u/jeff.rhodes)\ **Replies:** 8\ **Last updated:** [December 23, 2024, 3:00am UTC](https://forum.code.org/t/unit-4-abstrat-art-issue/40236 "2024-12-23T03:00:33Z")
I am having an issue with the filer reader. I am copying code directly from the multi selection unit and just changing the names. Even when I copy and paste code that works in from a previous lesson, it won’t work in … --- ## [Unit 4 - Lesson 6 - Level 7](https://forum.code.org/t/unit-4-lesson-6-level-7/40165)
**Author:** [@tlarocque](https://forum.code.org/u/tlarocque)\ **Replies:** 3\ **Last updated:** [December 4, 2024, 11:51pm UTC](https://forum.code.org/t/unit-4-lesson-6-level-7/40165 "2024-12-04T23:51:29Z")
The “Unique Colors” option for level 7 of lesson 6 requires students to use a nested if statement to make sure all of the colors are equal. Nested if statements are not taught until the following lesson. Is this intended… --- ## [CSA G Slides Unit Anchor Charts](https://forum.code.org/t/csa-g-slides-unit-anchor-charts/40086)
**Author:** [@zrmckeever](https://forum.code.org/u/zrmckeever)\ **Replies:** 2\ **Last updated:** [November 11, 2024, 7:36pm UTC](https://forum.code.org/t/csa-g-slides-unit-anchor-charts/40086 "2024-11-11T19:36:48Z")
Hey everyone, I made 3’ x 2’ anchor charts by chopping and combining Code.org slides. Our in-house graphics/printing department printed and laminated them for “cheap.” These have been an excellent addition to my walls. … --- ## [U4L5 5B AV Cars](https://forum.code.org/t/u4l5-5b-av-cars/38729)
**Author:** [@bbinkley](https://forum.code.org/u/bbinkley)\ **Replies:** 2\ **Last updated:** [November 30, 2023, 4:04am UTC](https://forum.code.org/t/u4l5-5b-av-cars/38729 "2023-11-30T04:04:25Z")
To get numbers between 200 and 500 inclusive don’t you have to multiply by 301 rather than 300 as 300 will only generate up to 299 so the highest value you could generate is 499 --- ## [CSA Unit 4 Lesson 6 Extra Practice](https://forum.code.org/t/csa-unit-4-lesson-6-extra-practice/38702)
**Author:** [@zhu.xiaobo](https://forum.code.org/u/zhu.xiaobo)\ **Replies:** 3\ **Last updated:** [November 26, 2023, 11:21pm UTC](https://forum.code.org/t/csa-unit-4-lesson-6-extra-practice/38702 "2023-11-26T23:21:05Z")
For U4 Lesson 6 Extra Practice, could somebody help me understand why C is the correct answer? C. crayon.equals(sharpie) The equals() method in Marker class only defined what returns false, and it doesn’t have any com… --- ## [Answer key to Unit 4 Lesson 9 Activity Guide - De Morgan's Law?](https://forum.code.org/t/answer-key-to-unit-4-lesson-9-activity-guide-de-morgans-law/38686)
**Author:** [@zhu.xiaobo](https://forum.code.org/u/zhu.xiaobo)\ **Replies:** 2\ **Last updated:** [November 20, 2023, 4:39pm UTC](https://forum.code.org/t/answer-key-to-unit-4-lesson-9-activity-guide-de-morgans-law/38686 "2023-11-20T16:39:59Z")
Does anybody have an answer key to the Unit 4 Lesson 9 Activity Guide - De Morgan’s Law? And the Activity Guide requires inputting information from Line 157 and from Game 1 and Game 2, but I can’t find these information … --- ## [Theater assets using a chromebook](https://forum.code.org/t/theater-assets-using-a-chromebook/38526)
**Author:** [@bbinkley](https://forum.code.org/u/bbinkley)\ **Replies:** 1\ **Last updated:** [October 17, 2023, 12:17am UTC](https://forum.code.org/t/theater-assets-using-a-chromebook/38526 "2023-10-17T00:17:08Z")
One of my teachers students only have chromebooks to use. How can they add to the theater assets without being able to download the file onto the chromebook. We’re only seeing 3 assets right now (all smiley faces) and he… --- ## [Javalab theater - drawImage from web address](https://forum.code.org/t/javalab-theater-drawimage-from-web-address/37739)
**Author:** [@timothy.lee](https://forum.code.org/u/timothy.lee)\ **Replies:** 1\ **Last updated:** [March 9, 2023, 11:09pm UTC](https://forum.code.org/t/javalab-theater-drawimage-from-web-address/37739 "2023-03-09T23:09:53Z")
We are about to start the Unit 4 project for CSA. In trying to build my own version with the birds database, I am having trouble using the drawImage command with the web addresses of the images. Does the Theater not allo… --- ## [The Theater outside of Code.org](https://forum.code.org/t/the-theater-outside-of-code-org/37087)
**Author:** [@dahlem\_brian](https://forum.code.org/u/dahlem_brian)\ **Replies:** 5\ **Last updated:** [March 8, 2023, 2:20pm UTC](https://forum.code.org/t/the-theater-outside-of-code-org/37087 "2023-03-08T14:20:44Z")
Hey everyone, At my Academic Year Workshop this past week we looked at the final project for Unit 4. We thought that the project might be a bit more involved than we have seen up to this point, especially considering th… --- ## [Help with Student Abstract Art Project](https://forum.code.org/t/help-with-student-abstract-art-project/37685)
**Author:** [@brian\_costello](https://forum.code.org/u/brian_costello)\ **Replies:** 2\ **Last updated:** [March 2, 2023, 12:12am UTC](https://forum.code.org/t/help-with-student-abstract-art-project/37685 "2023-03-02T00:12:13Z")
Can someone help us figure out why these nested if statements don’t work! --- ## [Unit 4 Lesson 6 - Expectations](https://forum.code.org/t/unit-4-lesson-6-expectations/37421)
**Author:** [@jranta](https://forum.code.org/u/jranta)\ **Replies:** 5\ **Last updated:** [January 10, 2023, 1:07am UTC](https://forum.code.org/t/unit-4-lesson-6-expectations/37421 "2023-01-10T01:07:29Z")
I just finished Lesson 6 for the Combine Sounds challenge. Are you expecting students to know how to combine arrays? Where would they have gotten that knowledge? Is there an easier way to create the combineSounds method … --- ## [drawLine in Theater Project](https://forum.code.org/t/drawline-in-theater-project/37367)
**Author:** [@fieldd](https://forum.code.org/u/fieldd)\ **Replies:** 1\ **Last updated:** [December 12, 2022, 8:49pm UTC](https://forum.code.org/t/drawline-in-theater-project/37367 "2022-12-12T20:49:00Z")
Is there a way to draw a line in the theater project? --- ## [Rotate a polygon?](https://forum.code.org/t/rotate-a-polygon/37356)
**Author:** [@jranta](https://forum.code.org/u/jranta)\ **Replies:** 4\ **Last updated:** [December 9, 2022, 7:19pm UTC](https://forum.code.org/t/rotate-a-polygon/37356 "2022-12-09T19:19:58Z")
I want to draw a triangle with the peak of the triangle centered over the center of the base of a triangle. The documentation for polygon doesn’t show how to rotate the polygon. Is it not possible? It’s important for cre… --- ## [CSA Unit 4 Lesson 5: De Morgan’s Laws](https://forum.code.org/t/csa-unit-4-lesson-5-de-morgan-s-laws/37249)
**Author:** [@fieldd](https://forum.code.org/u/fieldd)\ **Replies:** 1\ **Last updated:** [November 22, 2022, 2:13am UTC](https://forum.code.org/t/csa-unit-4-lesson-5-de-morgan-s-laws/37249 "2022-11-22T02:13:05Z")
Is there a way to have students work on de morgan’s law without the workstations? We are having huge absenteeism because of the COVID/RSV/ FLU. Is there an online equivalent or some type of online worksheet to help wit…