Step-by-step explanation:
One common pronunciation problem that I have observed in my students, who are native speakers of Spanish learning English, is the pronunciation of /th/ sounds. In Spanish, this sound does not exist, so it can be challenging for Spanish speakers to produce it correctly in English words such as "think," "thing," and "both."
To address this problem, one activity that could be used in class is minimal pairs practice. The teacher can provide a list of words that differ only in the /th/ sound, such as "think" and "sink," "thing" and "sing," and "both" and "boat." Students can practice listening and repeating the words in pairs, focusing on the correct production of the /th/ sound. Additionally, the teacher can provide visual aids, such as diagrams of tongue placement, to help students understand the correct mouth position for producing the /th/ sound.