Help your students retain the vocabulary and spelling words you've taught them.
Each time your students have new vocabulary or spelling words have them write their words on index cards. On the other side (of the index cards) write the definition.
Have students store their cards in an empty shoebox, they call their "Word Bank". Throughout the year have your students break up into teams and review the definitions and spellings.
By the end of year your students will have mastered their words.