Which of the following manipulative materials would be an example of a self-correcting material?

A. Shaker jars to match by sound
B. A number-line puzzle
C. A jar of buttons to classify
D. Tweezers and pompoms to sort

my answer is a.

Shaker jars to match by sound

Your answer is correct. Shaker jars to match by sound would be an example of a self-correcting material.

To determine which of the given manipulative materials is an example of a self-correcting material, let's first understand what self-correcting means in this context. Self-correcting materials are educational tools that allow children to recognize and correct their own errors independently. They provide immediate feedback to help learners evaluate their performance and make necessary adjustments without external assistance.

Now, let's examine each of the options to find the self-correcting material:

A. Shaker jars to match by sound: In this activity, children need to match objects based on the sound they produce when shaken. If the child makes an incorrect match, they can easily identify the error by listening to the sound. Therefore, this option is a self-correcting material.

B. A number-line puzzle: Although a number-line puzzle can be a valuable educational resource, it is not inherently self-correcting. The child might need feedback from a teacher or guide to ensure correct placement of the numbers. Thus, option B is not a self-correcting material.

C. A jar of buttons to classify: This activity involves the classification of buttons based on specific criteria. While it aids learning, a jar of buttons does not offer an immediate self-correcting mechanism. The child would need external input to assess the accuracy of their classification. Hence, option C is not a self-correcting material.

D. Tweezers and pompoms to sort: This activity involves using tweezers to sort pompoms according to certain attributes. Similar to option C, this material lacks an inherent self-correcting mechanism. The child would need an external source of feedback to verify and correct their sorting. Thus, option D is not a self-correcting material.

Based on the explanations provided, it can be concluded that option A, shaker jars to match by sound, is indeed an example of a self-correcting material.