Here are a few Measurement and Number Sense projects that program a working clock in Scratch. It starts with Primary and works up to Junior.
There is an advanced project as well. Students are asked to adjust the ratios between the two hands already on the clock, band to add a third (hour) hand to the clock as well.
If you want to learn along with your class, try the Primary or Junior video tutorials.
Primary Clock Project:
Here is the starter project your students will use:
If your students are in Grade 4-6, or found the above project easy, here is a video tutorial and project for them to try.
Junior Clock Project:
Here is the starter project your students will use:
Scaffolded Project:
Students can try this project where one of the "hand" sprites is already coded, and they have to code the other hand to be in the correct ratio as they travel around the clock face:
Students can try this project where one of the "hand" sprites is already coded, and they have to code the other hand to be in the correct ratio as they travel around the clock face:
Represent Ratios found in Real Life Contexts:
The "hand" sprites need to turn (rotate) around the clock. Can you code the hands to go around the clock at the proper ratio?
Extension: Can you add an "Hour" hand sprite to turn and represent each hour at a ratio that matches the Minute and Hour hand sprites?
How did you figure out the solution? Explain the math you used to make the program work properly.
Easier Project:
Number Sense and Numeracy/Measurement:
Clock: Switch the Stage Once an Hour
This clock switches its backdrop, but it is not switching it once an hour as its programmer intended. Can you change the program so it changes the backdrop once an hour?
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