Hi Precious and welcome
We tutored her ourselves in the end, which was actually really enjoyable and gave us a clear sense of how things were progressing. I must say that we spent quite a bit on learning materials, especially the English comprehension/composition books as that was her weakest area, and filled 2 smallish plastic crates with them after the tests (ready for dd2). DP worked through the English books on Saturdays, and I covered the NVR and VR during the week. We shared the Maths between us. Are you applying to any other selectives or just Latymer? If it's only Latymer you will only be required to cover the three subjects.
The big challenge is getting to R2 as 1700+ applicants are reduced to 500+ by the NVR. That test is in 4 x 20 sections with 10 minutes for each section. Once you are through to R2 the chance of a place is almost 1 in 2
We bought all the 'how to do' books on NVR and worked through them, but ignored cube-nets which aren't in the GL/Nfer tests. We then worked through the 10 minute and assessment tests, building up to the proper tests and strict timing. By late summer we made dd complete them in time, then with 5 minutes to spare, and mark questions which were tricky for the end. I liked the IPS ones, which did have a couple of mistakes, but were very close to the real thing according to dd, who claimed that 2 questions in the Latymer were identical to IPS ones already tested. The NVR scores of the 2nd round children are re-standardised in round 2, so the higher the mark in R1 the better, as by R2 73/80 could be 90/140 and 78/80 could be 140. Five marks could turn into 50 points!
What books/printouts are you using? Do you have the Latymer past papers in Maths? It's a bit early for actual tests, but they are a good window into the style and subjects covered. I think that their test is very tricky, and as I've said before the closest papers I've found are Habs ones. You will need to cover Y6 maths by November to do well in the Maths. The average score in the test is under 30/50. We aimed at the mid 40's, and dd scored 44-46/50 leading up to the test and 43 in the test.
I hope that helps.....I found this forum fantastic for help and support. Remember to post/check the individual subject area forums too...I can't recomment the hepful advice there enough.
Good luck and get ready for an emotional rollercoaster ride!