A good crystal layout for concentration/ learning?

I have my GCSE’s coming up next month and was wondering what a good crystal layout is for improving your concentration and helping you to learn. I’ve been into crystal healing for many years and other alternative therapies too. I know that dark blue/indigo colours and the third eye are associated with your mental capabilities, but what is a good meditation layout to help with concentration?

you want the flower of life layout, or the merkaba. any sacred geometry shapes/layouts will be of great benefit (triangle, square etc.)
http://www.crystalinks.com/merkaba.html

Mini-Colors Therapy – Crystal layout healing method

6 AMPHIBOLE GEMSTONES FOR GRIDS, LAYOUTS & REIKI £3.99 A WONDERFUL SET OF 6 GENUINE AMPHIBOLE QUARTZ CRYSTALS SIZES ARE DIFFICULT TO SAY BUT SIZES ARE APPROX FROM 1″ to 1/2″ long x 1/2″ to 3/4″ wide I have shown you four photographs to give examples of the packs but please be aware that you are buying 1 pack of 6 crystalsAngel Phantom Quartz (Amphibole) is a Quartz Crystal with PHANTOM INCLUSION of (LIMONITE, CAOLINITE AND HEMATITE) Which appear…