Whiteboard Marker Educational Illustration

Whiteboard hand-drawn marker style educational illustration, [ASPECT_RATIO], explaining [TOPIC].

=== TITLE ===
"[MAIN_TITLE]" in bold black handwritten marker font
[SUBTITLE_IF_NEEDED] in slightly thinner casual marker style

=== SCENE & LAYOUT ===
Layout: [LAYOUT_TYPE] (e.g., structured comparison table with checks and crosses / mindmap radiating from center / step-by-step flow with arrows / split-screen debate board / roadmap journey with arrows / cause-effect fishbone diagram / layered system architecture / checklist with highlights, based on the logic of the MAIN CONTENT below)

Background: Realistic whiteboard surface, soft reflection, subtle eraser smudges, slight shadow at edges
Frame: Aluminum whiteboard frame visible
Decorative elements: Hand-drawn arrows, circles, underlines, exclamation marks, lightbulbs, gears, speech bubbles in red and blue marker

=== MAIN CONTENT ===
Use simple hand-drawn cartoon doodles (marker sketch style)

[CONTENT_SECTION_1]
Character/Element: [ELEMENT_NAME]

Expression/State: exaggerated marker doodle expression

Props: simple outlined objects with red/blue accent lines
Visual: sketchy icon with motion lines
Label: "[LABEL_TEXT]" written as if quickly handwritten
[DIALOGUE_OR_ANNOTATION] in speech bubble

[CONTENT_SECTION_2]
[Similar structure as above]

[CONTENT_SECTION_N]
[Continue as needed]

=== KEY CONCEPTS ===
[NUMBER] floating info boxes drawn as marker rectangles with uneven edges:
Box 1: "[CONCEPT_1]"
Box 2: "[CONCEPT_2]"
Box N: "[CONCEPT_N]"

=== WHITEBOARD STYLE ===
Real classroom whiteboard aesthetic, black base marker lines, red and blue emphasis strokes, visible stroke overlap, slight perspective depth, natural lighting, casual sketch composition, instructional yet playful

=== MOOD ===
Energetic, explanatory, slightly humorous, practical and easy to understand

Quality: High-resolution whiteboard illustration, clear visual hierarchy, suitable for educational thumbnail or knowledge-sharing poster