# 4.10 比率 Ratio

STEM lessons + blocks

## Students will work with collections of physical objects, stating the ratios between groups. Students will explore what happens to the ratio when items are added or removed.

Students will integrate and exhibit learning by programming a SAM system to keep track of ratios: totals and components.

## 在本課程中，學生將使用物件集合併說明兩組之間的比率。學生將探索添加或刪除項目時比率的變化。

• 45/90 minutes Ratio- Teacher Lesson Plan with notes (script) on lesson PowerPoint
• Ratio -  Teaching PowerPoint
• Ratio - Student Workbook (worksheet)

What is SAM Labs? (1 min)

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Webinar: How to use SAM Labs in the classroom? (30 mins)

## SAM Labs Blocks used in this lesson - Ratio

SAM Space App Software blocks used:

• Key Press
• Toggle
• Counter
• Interval
• Compare

SAM Space software blocks used:

Key Press

Toggle

Counter

Compare

Interval

SAM Labs in the classroom videos   - see 14 videos here

The following tutorial, though is not directly related to this lesson, will give you a good feel of how SAM Labs works.

3-minute Tutorial: Compare in SAM Space featuring the RGB LED light

Blocks used in the above tutorial (see full SAM Blocks (physical and virtual blocks) directory here):

Physical block - RGB LED light, Light sensor

Software bocks:

• Compare

The SAM Labs approach provides concrete solutions to link Computational Thinking to Coding in a non-technical, friendly approach for all teachers and learners.

See this document:   SAM Steam approach and computational thinking

References:

• BrainPOP movies/quizzes and games on Computational Thinking, Programming (coding), STEM and more.   These are good resources for teachers and students to clarify the meaning of key concepts.   Contact us if you like to have a trial.

BrainPOP Jr:  Computational Thinking Explained

BrainPOP Jr.

## Want to try some Cool, Crazy ideas that kids, adult, everyone loves?  Check the followings ideas guide from SAM Labs:

The Book of Crazy Cool Ideas

To see the step-by-step video on how to connect the blocks, please click blow:

1. Traffic light 交通指示燈 (easy, 1 player, gadget)
2. Kaleidoscope 萬花筒 (easy, multi-player, gadget)
3. Pattern-Bot  繪畫機械人(medium, multi-player, home hack)
4. Door Prank 惡作劇之門  (easy, 1 player, home hack)
5. Bridge 起動式橋樑 (medium, multi-player, gadget)
6. Flipbook 翻書動畫 (medium, 1 player, gadget)
7. Stirring Machine 攪拌機 (easy, 1 player, home hack)
8. Alarm 鬧鐘 (medium, 1 player, home hack)
1. Flashlight 史詩火炬 (medium, 1 player, gadget)
2. SyncDancers 同步舞者 (easy, multi-player, gadget)
3. Smart Watch 智能手錶 (medium, 1 player, gadget)
4. Pinball 彈珠球 (medium, multi-player, game)
5. Conductor 指揮者 (easy, 1 player, game)
6. Football game 足球比賽 (medium, multi-player, game)
7. Gameshow button 遊戲按鈕 (medium, multi-player, game)
8. Drawing Machine 繪圖機 (hard, 1 player, home hack)