English pronunciation: short and long vowels

https://www.educ.ar/contenidos/ver?contenido=1066

/j/ versus /dz/

/I/ versus /i:/

https://create.kahoot.it/share/long-and-short-i/2852f8d7-3993-4102-bf6e-b6dc14e4c28e

https://create.kahoot.it/share/long-short-vowels/92acfa37-73ed-441b-8efb-7bbea7266603

https://create.kahoot.it/share/long-i-short-i/31f4af10-ae87-4ec9-806c-aace412064fa

long u vs short u

https://create.kahoot.it/share/short-u-long-u/d0b49984-8305-44d7-a3d4-a0b5c0019376

https://create.kahoot.it/share/short-and-long-u/a91ab7c6-fb72-4d49-b18b-2e98ba839a2b

j and y sound 

https://create.kahoot.it/share/j-and-y-sounds/28fd0110-44cb-4c3e-bc49-4ebff2e9fc34