/θ/ vs /s/

/θ/ is tongue-between-teeth (interdental); /s/ is tongue-behind-teeth (alveolar).

Minimal pairs to practice

• thin vs sin
• thick vs sick
• think vs sink
• thumb vs sum
• mouth vs mouse
• path vs pass

Record each pair below. The analyzer listens for which side of the pair you actually produced and tracks your discrimination rate over time — visible as a chip on your Pronunciation Map.