L2 Math Stage (4-6 years old). Spark thinking is ingeniously developed according to China's "Guide to Learning and Development for Children Aged 3-6" and CCSS, the American common core state standard, and a nine-stage curriculum system for children in China is compounded. L2 stage spark thinking mathematics is suitable for children aged 4-6. Cognitive graphic space in L2 stage of Spark Thinking Mathematics can increase proficiency in quantity perception, comprehensively cultivate children's logical analysis ability and feel the application of mathematical logical relations. Spark thinking is an online education brand that focuses on children's logical thinking. Its main products include logical thinking, Chinese literacy and programming.