I recently took my first NATE exam. I passed my AC specialty test with an 87, but I failed my Core with a 68. I'm looking for some advice on passing the Core test when I re-test after the summer. I'm also wondering which specialty test I should go for next. Its up in the air between Gas Furnances or Heat Pumps. Any advice would be greatly appreciated. Also feel free to post your scores so I can set a goal to beat.