My Take
As a teacher, I really like espark. I am impressed with the level of thought that went into each quest. They are taken to different websites to play games, read books, or get remediation. I especially like the videos at the end. Highly recommend.
How I Use It
My kids love Espark, or Sparkle as they call it. They log in and complete quests at their individual levels. The kids are working on skills that they need and at their own pace. They love this program.