Getting past the short vowels

Zelie is feeling more and more confident with sight words and can do short vowels, but she is completely avoiding the lessons that challenge her to move beyond that! (We are still doing Lexia on the computer – in her current level, she just has the two silent-e games left to master!)
I know that she is avoiding it because it is harder for her. Now that she has a “trick” with sight words (the pictures on the words), she can do those. However, trying to remember that the “e” on the end makes the vowel long and even being able to hear whether a vowel is long or short is a challenge in and of itself.
So, any advice from those with dyslexia? Is it just from lots of practice that you are able to tell the different between can and cane? Please share your thoughts and experiences!