Diphthongs

Examples:
http://www.fonetiks.org/engsou3am.html

Vowels

Practices:

http://www.roythezebra.com/reading-games-long-vowel-phonemes.html

Reflexive sounds

They are special cases of English consonants

http://www.translationdirectory.com/articles/article1875.php

Voiced and Voiceless

Place and Manner of articulation

http://www.cram.com/flashcards/place-of-articulation-for-consonant-phonemes-3135931

Vocal tract

Game.
http://www.purposegames.com/game/the-vocal-tract-quiz