We focus on spelling daily but especially on a Monday when a new rule/ phoneme is introduced. On Friday there is a dictation using some or all of the words we have been focusing on. This gives us the opportunity to use words in context.  
There are lots of different ways to work on spelling e.g. the pyramid method, tracing method or the 'look, say, cover, write, check' method.
Why not look for little words in bigger ones or draw pictures to help you remember the word? You could even sprinkle rice on a tray and trace out your spellings. Don't forget to join your writing!
There is a list of the Year 3 and 4 Tricky words below. We learn the first half in Year 3.