Brain DeCoded with CodeX - Mission 3, Objective 1: Brain Chemicals
Mission 3 · Objective 1 Lesson Plan
Brain Chemicals
Students read about the chemistry behind brain signals and learn the difference between a neurotransmitter, which delivers one targeted message, and a neuromodulator, which changes how whole groups of neurons behave.
⏱ 40-60 min
🎯 Grades 8-12+
💻 CodeSpace
📖 Reading & Discussion
🧠 Brain Chemistry
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Overview
Mission 2 was about the wiring. This mission is about the chemistry that runs through it, and Objective 1 is where students meet it. There is no code to write here. This objective is reading material, and it sets up every objective that follows in the mission.
Students learn that a neurotransmitter carries one specific message from one neuron to the next, while a neuromodulator works across groups of neurons and changes how the whole conversation goes. Dopamine and serotonin do both jobs, which is exactly why they show up in discussions of motivation, mood, and memory.
Students end the objective by responding to three prompt questions, including what adjustments they would make to their own "symphony of the brain." They create a file in CodeSpace for that written response.
🎯 Project Goal: Students explain neurotransmitters and neuromodulators.
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Learning Targets
- I can explain what a neuromodulator is.
- I can explain the difference between a neurotransmitter and a neuromodulator.
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Key Concepts
- Dopamine and serotonin are powerful neurotransmitters and neuromodulators.
- A neurotransmitter sends one targeted message. A neuromodulator changes how a whole group of neurons communicates.
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Assessment Opportunities
- Exit ticket: students write their own analogy for neurotransmitters and neuromodulators.
- Written response that summarizes the three prompt questions.
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Success Criteria
- Discuss the impact of neuromodulators
- Give examples of neuromodulators influencing motivation, mood, or memory
- Answer the prompt: what adjustments would you make to your symphony of the brain?
- Create the written response file in CodeSpace
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Extensions & Cross-Curricular
ExtensionUse supplemental materials to go more in-depth about neurotransmitters and neuromodulators.
ExtensionHave students create a video, web page, poster, or slide deck about neuromodulators and present it to an audience.
Visual ArtsStudents create an art project that visualizes neurotransmitters and neuromodulators.
Lang ArtsStudents write a summary of a topic covered in this objective.
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Classroom Materials
- ▸Laptop/computer with Chrome browser, so students can create the written response file in CodeSpace
- ▸Optional: supplemental reading, video, or articles to go more in-depth on neurotransmitters and neuromodulators
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Vocabulary
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Neurotransmitter:a single neuron that sends a specific targeted message to another neurotransmitter.
Neuromodulator:neurotransmitters working together to regulate how groups of neurotransmitters communicate.
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Standards
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English Language Arts & Literacy
RST.11-12.1
WHST.9-10.2.a-f
WHST.11-12.2.a-e
Life Science Connections
HS-LS1-1
HS-LS1-6
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Preparing for the Lesson- Read the objective all the way through first. It is dense reading for students, and knowing where the three prompt questions land helps you pace the period.
- Decide how students will read: silently, in pairs, or as a class read-aloud. This objective moves faster when the reading is broken up with discussion.
- Decide how students will submit the written response. They still need to create the file in CodeSpace to meet the goal, even if the writing itself happens somewhere else.
- Pull together any supplemental materials you want to add. Nothing extra is required, but this is a good place to bring in a short video or article if your class wants more depth.
- Have an analogy of your own ready for the exit ticket. Students write better analogies when they have heard one modeled first.
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Teacher Notes- This objective is reading material for students. Feel free to supplement with any additional materials.
- Students are asked to create a file in CodeSpace for their written response. Students can complete the response a different way, but they still need to create the file to meet the goal.
- There is no code and no CodeX in this objective. Students only need a computer to reach CodeSpace.
- The neurotransmitter and neuromodulator distinction is the one thing students carry forward. Every remaining objective in this mission builds on it, so it is worth the discussion time.
- Extensions and cross-curricular projects are included to enhance the concepts in the objective. You can use the extensions to extend students' learning.
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Lesson Outline
🗣️Warm-up / Hook
Start with the gap between wiring and chemistry.
- Ask: "We spent all of Mission 2 building the wiring. So why do two people with the same wiring end up in completely different moods?"
- Ask: "What is the difference between one person shouting a message and someone changing the volume in the whole room?"
Teaching tip: That second question is the entire neurotransmitter vs. neuromodulator distinction in plain language. Park the answers on the board and come back to them at the end of the period.
📖Reading & Discussion
Students work through the objective's reading on brain chemicals.
- Students read the objective, individually, in pairs, or as a class.
- Stop after the neurotransmitter section and have students say the definition back in their own words before moving on.
- Cover dopamine and serotonin. Both act as neurotransmitters and as neuromodulators, which is what makes them so influential.
- Pull for examples: where do students see motivation, mood, or memory being turned up or down in their own day?
Teaching tip: Students often flatten "neuromodulator" into "another neurotransmitter." Push back on that every time it comes up. The scale is the point, one target versus a whole group.
💻Written Response
Students create their file in CodeSpace and answer the prompts.
- Students create the response file in CodeSpace. This is required to meet the goal, even if they draft their answer somewhere else.
- Students respond to the three prompt questions, including "What adjustments would you make to your symphony of the brain?"
- Circulate and check that responses use the vocabulary correctly, not just generally.
Teaching tip: The symphony prompt is the one students actually enjoy. Give it a few minutes of open discussion before anyone writes and the responses come back much stronger.
✏️Wrap-up & Exit Ticket
Close with the analogy.
- Exit ticket: each student writes their own analogy for neurotransmitters and neuromodulators.
- Read two or three out loud. The ones that get the scale right are the ones to highlight.
- Preview the mission: from here on, students will simulate what these chemicals do to mood, memory, and reaction time.
Teaching tip: Keep the best analogies posted. You will want to point back to them in Objective 2 when students start simulating daily activities and watching the neuromodulator levels move.