Morphemes are units of words. An unbound morpheme is one that can be a word on its own. For example, "blue" is an unbound morpheme, but it can be paired with another word, "berry," which is also an unbound morpheme. These morphemes are often paired with bound morphemes to create new word meanings.
A bound morpheme has meaning, but it cannot stand on its own. Bound morphemes are usually prefixes or suffixes like "dis," "un," "-ed," or "-tion." A Key Stage 2 spelling game for this concept could take common bound and unbound morphemes, put them on note cards, and have students mix and match them to make words. As the students make new words, ask if the student has heard the word before, and ask if it is a real word in English.
Games for silent-letter combinations introduce the concept of English as an evolving language. Choose common silent letter phonemes, like kn, gn, rh, lm, or lf, and introduce them in commonly used words. You can make collections of these words on note cards, or if you have access to a smart board, you can make a board game where the children take the phonemes and blend them together to make common words. Get a picture of a word, like knife, and have "ife" underneath the picture. The children will pick from the silent letter combinations to make the right word. If you don't have access to a smart board, this can be done on an overhead projector or via note cards. Just glue the picture on from a magazine, or print it from clip art.
Contractions are commonly used words in English, and often spelled incorrectly. Begin by showing the full form of common contractions, for example, "I cannot," or "It is." Take magnetic letters or letter manipulatives and have them spell out the full form. Remove letters and show the apostrophe sliding in. Once the students understand that the apostrophe shows that letters have been removed, you can play a drill game. Divide the students up into teams and let them get points for common contractions spelled correctly. This can also be done on a smart board if you have access to one, and the students will use their fingers to remove letters and add the apostrophe.