- Prepare the box ahead of time with only the heaviest and lightest pairs.
- Invite the child to do the work.
- Ask the child: “Would you like me to show you the baric cylinders? These are the baric cylinders. Baric means weight.”
- Place the box in the center of the mat.
- Remove cylinder with 3-finger grip.
- Arrange cylinders randomly in a line from left to right.
Start with the left cylinder, carefully lift it and place it in the palm of your hand.
- “Would you like to feel how heavy this one is?” Return the cylinder back in line.
- “Now let’s see if we can find a match. I am going to use my hand to do this work.”
- Isolate the left cylinder, feel the weight
- Weigh each remaining cylinder until you find a match. Move out of line slightly. Weigh the control again, move match to the side. Weigh control, weigh match. “These two match. They are a pair.”
The Baric Cylinders Lesson: Presentation II-V
Add additional pair per presentation until there are six pairs.
The Baric Cylinders Lesson: Presentation VI
- “Would you like to do something new with the baric cylinders?”
- Arrange cylinders in random line left to right.
- “Now I am going to find the heaviest cylinder.”
- Weigh each one until you find the heaviest cylinder: “This one is the heaviest.”
- Move the heaviest cylinder to the lower left.
- “Now I am going to find the lightest cylinder.”
- Weigh each one until you find the lightest cylinder: “This one is the lightest.”
- Move the lightest cylinder to the lower right.
- “Now I am going to look for the next heaviest,” and so on until all are graded in a line.
- Recheck the line from left to right.
- Offer the child a turn.