These are words of the day from Merriam Webster that include at least one reduced vowel, represented in the transcript as /ə/.

This will allow you to identify the vowels that you reduce and that you have to pronounce reduced.

• Click on the button where you identify a reduced vowel.
• But not only by the ear, study them using the button and Praat, record your imitation and let yourself decide when you already say it.
• You can watch videos from Youglish.com by pressing the button . Remember the facilities that it offers.
• And with the links to the dictionaries verify it.