Final answer:
The teacher is using the teaching strategy of scaffolding.
Step-by-step explanation:
The teaching strategy that the teacher is using in this scenario is called scaffolding. Scaffolding is a teaching technique in which the teacher provides support and guidance to help students achieve a task that they would not have been able to accomplish on their own. The teacher gradually reduces the support as the student gains mastery of the task. This strategy helps students build their skills and confidence.