π SparkMart: Percent Economy Simulation No-Prep, High-Engagement Percent Math Activity (Grades 6β8) Percent lessons shouldnβt feel like drills. If your students can calculate percents but struggle to reason, justify decisions, or stay engaged, SparkMart turns percent math into a real-world business simulation where choices have consequences and profits rise or fall based on student thinking. In SparkMart, students become store owners who must make real pricing decisions using markup, discounts,