They are in all probability saying that parents may choose to have their children's progress measured with the Woodcock-Johnson achievement tests, which are administered by a trained psychiatrist/psychologist. At least once, while they are young, it is a good idea to also do an IQ test.
Personally, I believe these tests measure the kids progress better than any SAT's or OLSAT's. The problem is the cost: about $160 for the Woodcock-Johnson and another $160 if they need IQ testing.