What sequence of the following instructions should be followed in development of a mathematical concept in elementary classes?
I. Drawing pictures
II. Using symbolic representation
III. Providing experiences
IV. Explaining through language

The correct option is III, IV, I, II.

According to ELPS theory (suggested by Pamela Liebeck), the development of mathematical concepts in elementary classes follows a specific pedagogical sequence to ensure conceptual understanding:

1. Providing experiences (III): Children start learning best by engaging with concrete objects and physical experiences. Hands-on activities help build a foundational understanding of abstract ideas.
2. Explaining through language (IV): After experiencing concepts concretely, children describe their observations using spoken language. This helps connect physical actions to verbal expression.
3. Drawing pictures (I): The next step transitions to visual representations. Children draw pictures or diagrams representing the concrete experiences and language concepts.
4. Using symbolic representation (II): Finally, children use abstract mathematical symbols (numbers, +, -, =, etc.) to represent the concepts concisely and formally.

Therefore, the correct sequence for developing a mathematical concept is III, IV, I, II.