I hope this is a private school....
No public school should be making such a recommendation. They should do an evaluation and provide the appropriate services.
LB has a decent reputation. Most of their programs work on an intense but short remediation, in which a kid goes all day everyday for a month, for instance. There is a lot of evidence that the gains are significant. When I looked a while ago, I could find no evidence that the initial gains are retained - not to say that they are not, but there is no evidence for it because it hasn't been studied. (I had been looking because DD's school wanted to stop services after a fast, intense remediation with a different method. I was looking for any evidence of gains retained after a rapid gain.)
The best analysis I'd read was on What Works Clearinghouse. Write your congressman to fund the government so the website can come back up.
