Agree with Watermelon8.
Looking back now we were very naïve as we did very basic tutoring with DS, he failed GS test, managed to get a place and is now on course to achieve 8xA* and 2x9 and in the top 5 of his year. He had the ability (leaving primary with levels 6C, 5A and 5A) but no insight as to what the GS exam involved.
We home tutored DD and paid for her to sit mock exams so the actual day would not present her with any shocks. Even though (dare I say it
) she is not "as" bright as her brother she passed GS test for 3 schools.
You have to do prep to give your DD any chance. As their are numerous 11+books available, you can easily do it yourself so you don't have the stress of finding a tutor, (just maybe the stress of getting DD to work through them
All schools should have resources available if your DD struggles with any subject. My belief is, if your DD passes the test she should be able to cope in a GS. She will have to be prepared to work and not become complacent. I think a Grammar will "stretch" a child's ability, whereas a comp may not "push" them as hard.