Brain Development Timeline Explorer¶
Run the Brain Development Timeline Explorer MicroSim Fullscreen
You can embed this MicroSim in your own course website with this iframe:
About this MicroSim¶
Brain Development Timeline Explorer is an interactive MicroSim for this health-education textbook.
Students explain that different brain regions mature at different rates, and describe why the mismatch between an early-maturing reward system and a late-maturing prefrontal cortex makes the adolescent brain more vulnerable to substance effects.
Use the controls in the panel below the drawing to interact with the model, then talk through what changed and why. The MicroSim is width-responsive and can be embedded in any course page with the iframe shown above.
Bloom's Taxonomy level: Understand (L2) — explain, summarize, describe
Lesson Plan¶
Audience¶
This MicroSim is designed for Grades 6-8. For the K-3 bands the teacher typically drives the activity on a shared screen; older students can explore the MicroSim independently.
Learning Objective¶
Students explain that different brain regions mature at different rates, and describe why the mismatch between an early-maturing reward system and a late-maturing prefrontal cortex makes the adolescent brain more vulnerable to substance effects.
This activity targets Bloom's Understand (L2) (explain, summarize, describe).
Suggested Use (about 10 minutes)¶
- Warm up (2 min). Ask students what they already know about the topic and let one volunteer describe what they see on the screen.
- Model it (3 min). Demonstrate the interaction once, thinking aloud so students hear the reasoning behind each choice.
- Guided practice (3 min). Invite students to try the interaction and to predict what will happen before they act.
- Discuss (2 min). Ask why the result came out the way it did, connecting the on-screen result back to the learning objective above.
Check for Understanding¶
Have each student (or pair) explain their result in one sentence, using the vocabulary from this chapter. Look for reasoning that matches the Understand-level objective rather than a lucky guess.
Specification¶
The full specification below was extracted from Chapter 8: Substances and the Developing Brain.
Type: timeline
**sim-id:** brain-development-timeline-explorer<br/>
**Library:** vis-timeline<br/>
**Status:** Specified
Bloom Taxonomy: Understand (L2)
Bloom Taxonomy Verb: explain, summarize, describe
Learning objective: Students explain that different brain regions mature at different rates, and describe why the mismatch between an early-maturing reward system and a late-maturing prefrontal cortex makes the adolescent brain more vulnerable to substance effects.
Time period: Birth through age 25, with a highlighted band for ages 11-14 (the reader's current stage)
Events/regions plotted as horizontal bands showing relative maturity over time: "Brainstem (basic survival functions) — matures earliest, largely complete in early childhood"; "Limbic System / Reward Pathway (emotion and pleasure) — matures during the early-to-mid teen years"; "Prefrontal Cortex (judgment, impulse control, planning) — the last region to mature, not complete until the mid-20s."
Visual style: Horizontal timeline with three stacked growth bands from age 0 to 25, each band filling in gradually to show relative maturity percentage at each age; a vertical marker at ages 11-14 labeled "You are here."
Interactive features: Click any band to open an infobox explaining that region's function in plain language and why its maturity timeline matters; hover the "You are here" marker to see a one-sentence summary of the reward-system/prefrontal-cortex mismatch; a "Why does this matter?" button reveals a short infobox connecting the timeline to substance-use risk without naming or depicting any specific substance.
Color coding: Blue for brainstem, orange for limbic/reward system, green for prefrontal cortex; the "You are here" marker in gray.
Implementation: vis-timeline JavaScript library. Responsive width, reflows on window resize. No content in this diagram references how to obtain, use, or conceal any substance — it addresses brain development only.