Final answer:
Without specific information on the Education Standards Advisory Committee's membership from a reliable source, it's not possible to accurately answer the question about the number of members who are real estate instructors or owners of TREC approved schools.
Step-by-step explanation:
The question refers to the Education Standards Advisory Committee and the composition of its members in the context of real estate education. However, without specific reference information about the Education Standards Advisory Committee in the question or from a reliable source, it is not possible to provide an accurate number of members who are real estate instructors or owners of TREC (Texas Real Estate Commission) approved real estate schools. Data such as committee membership is typically provided by governing bodies or official sources and may change over time. Therefore, it is recommended to refer to the latest official publications or the TREC's official website for the most accurate and current information.