I bought Killtest ACT English preparation materials to help pull up my ACT American College Testing: English Section score, which had been stuck at a 24 for months. The structure of the materials is fantastic. It doesn't just drill you on grammar; it really breaks down the rhetorical skills and sentence structure logic that the ACT loves to test. The sections focusing on comma splices, modifier placement, and paragraph organization were particularly helpful. After running through these practice sets and reviewing my mistakes, I ended up scoring well on the English section! It completely changed my composite score and opened up new college options for me. Thanks a lot!