Take a spelling test and track your progress: Double consonants.
Double consonants in the middle of a word mark the boundary of two syllables (sum-mer). A double consonant follows the short vowel (fitter).
"This is a fantastic opportunity for our students! I'm sure Spellzone will be invaluable in helping them to improve their spellings and therefore improve the quality of their writing in all subject areas!"
Teacher, High School, UK