A teacher helping students based on the range between what they can do independently and what they can accomplish with support is using

Modeling involves demonstrating a behavior or skill for students to observe and imitate. While it can be a useful teaching strategy, it does not specifically address the range of capabilities a student has with and without assistance, as the ZPD does. Modeling focuses more on providing an example rather than assessing the student's current independent and supported abilities.

Classical conditioning is a learning process that involves associating a neutral stimulus with a significant one to elicit a response. This psychological theory primarily deals with behavioral responses and does not relate to the educational context of student independence and support in learning tasks, as outlined by the ZPD.

Operant conditioning is a method of learning that uses rewards and punishments to reinforce behavior. Although it can influence student behavior, it does not directly relate to the concept of assessing the range of students' capabilities with and without help. The ZPD specifically focuses on the developmental potential that can be reached through guided interaction.