Try these spelling a vocabulary tasks. Year 6's, you should be capable of giving these a good go. For the year 5's, you are welcome to attempt this; However, if this is to tricky, I would encourage you to spend some time on Doodle Spell or Doodle English.
Link for Doodle Spell https://students.doodleenglish.com/spell
Link for Doodle English https://students.doodleenglish.com/