Some teachers intentionally slow down their speech to let students hear them clearly, in the meanwhile, they keep the contraction to let students learn the pronunciation point.
For example, when speaking normally slow, "an apple" would be pronounced
/æn . ˈæpəl/. When speaking slow in a teaching way, the phrase would be pronounced
/ən . ˈnæpəl/.
How do I refer to this kind of teaching technique/tip/approach?