This video helped solve a lot of problems for me. My students almost always confuse the short i and long e sounds when saying English words. This was because their native tongue was Filipino, which is influenced by Spanish, which has Latin-derived vowels. So the letter "I" sounds like "ee". This is similarly found in Japanese and I believe Russian as well.
Filipino: Lito (Lee-toh)
Japanese: Kimiko (Kee-mee-koh)
Russian: Kirilenko (Kee-ree-leng-koh)
So the short I sound gives them fits. But after I showed them this video and taught them how to "feel" for the tense vowels, they found it easier to do! Thank you, Lisa Mojsin.