Final answer:
Incidental teaching starts by utilizing a student's interests or through routine activities to initiate learning opportunities.
Step-by-step explanation:
Incidental teaching can begin by capitalizing on a student's interests or by creating teaching moments during routine activities. In the first approach, Child-Initiated Interaction, the educator notes what the child is interested in and uses this to initiate a learning opportunity, such as expanding vocabulary when a child expresses interest in an object.
The second way, Environmental Arrangement, is to take advantage of naturally occurring opportunities, such as teaching counting during snack time or colors during playtime. These methods are highly interactive and student-led, fostering a more engaging and personalized learning experience.