The most common error pattern for Final Z is devoicing. This means it sounds like an "s" sound instead of a "z" sound. This is especially true on plurals and verb forms ending with letter s. You can learn more about when letter s says "z" with this video.
Practice these common words and phrases. Listen for the Final Z sound. If you have difficulty making a "z" sound on the words, try using 2-word phrases and linking the z to the next word. It is easier to use voicing on z when we link to the next vowel. Click here for Final Z linking practice.
Next steps: try some common plurals with final z. To learn which plurals say s and which say z, read more here.