There is learning it by:
repetition
drills
visually
auditorily
Kinesthetically (through motion)
Mnemonics (memorizing through association)
For young kids, through age 8 or so... they learn mostly via auditory and kinesthetic things... so, singing a song and doing a gesture WITH it.
Or, using visuals... for example: while spelling a word, SAYING it out loud.... at the same time. Or, looking at a picture of the word and then spelling/saying it... spelling it meaning they can do it written on paper... or saying/spelling it out loud... ."visualizing" it in their head.
Do whatever will be fun for your child... take her to the library or bookstore... peruse the books and see what she is interested in... then, get a marble notebook... and on each page designate an alphabet for each page. As she is reading the book she chose... have her keep the notebook next to her and write down any words that are new to her... or that she does not know how to spell or that she does not know the definition for. This marble notebook... will be her very own "dictionary" or "treasure book" of words. It will be a "fun" project and ongoing and can grow with her each year... by keep adding to it... and each year, she can see how far she has gotten and learned etc. AND, it will become a written keepsake/alphabet journal for her to keep... when she is a young lady/woman... and it will be treasured.
Or, have her write her own songs... telling her she can be a songwriter. Or have her write her own stories or plays... the words do NOT have to be spelled correctly at first....but then read it through together, when she completed her story/song/play... and then the words she mis-spelled can be written "correctly" in her Spelling "dictionary" or treasure book of words. ..ie: the marble notebook.
This is what my daughter does... we do it together, its fun. :) And, I as a child myself, used to do that. I would read even an entire dictionary!
All the best,
Susan