Thanks to Dave for this news: The Church has updated its scripture mastery scriptures for 2015's Old Testament curriculum. These are the specific Old Testament scriptures that are taught to LDS youth, ages 14-19.
Some of the new scriptures:
NEW: Genesis 2:24 - Husbands and wives should love and be faithful to one another.
NEW: Psalms 119:105 - God's word is a lamp unto my feet and a light for my path.
NEW: Isaiah 58:6-7 - Fasting loosens the bands of wickedness and relieves heavy burdens.
NEW: Isaiah 58:13-14 - The Sabbath day of the Lord is a holy day of delight.
NEW: Jeremiah 1:4-5 - God knew Jeremiah before he was formed in the womb.
See more, including dropped scriptures (though not dropped from LDS canon, of course), at Dave's Mormon Inquiry.