Questions are generated across the two SAT Reading & Writing skills covered here — Standard English Conventions (punctuation, sentence boundaries, subject–verb agreement, verb tense, modifiers) and Expression of Ideas (transition words, synthesizing research notes).
Every question is a fresh, rule-generated SAT-style problem. Missed questions get a step-by-step explanation and a follow-up variation.
Practice mode (default): endless single questions, checked instantly, drawn from every domain with the real test weighting and at any difficulty. Miss one and you get the how-to-solve plus a second variation. Every answer is saved as you go — so stop whenever you like. Exam mode gives you a fixed-size set to work through first.
1️⃣ Answer every question.
2️⃣ Submit — each wrong answer shows a step-by-step how-to-solve.
3️⃣ You get a variation of that question to try again.
4️⃣ Wrong again? The same instruction is shown and the question is marked ⚠️ to be resolved.
🔗 Every missed question links back to its trunk (the original source question).
🧩 Each exam is graded: Module 1 is the easier half and Module 2 the harder half, and both modules mix all four skills. Short quizzes still cover every skill.
🎯 Practice mode never runs out: questions keep coming at random, weighted so grammar (conventions) appears most often, transitions and synthesis less, and each answer is graded on the spot. Mistakes are saved the moment they happen, so the teacher view sees them even if you stop halfway.