I recommend a software "Shuang Jie Banknotes Treasure" to you, which is better than Wukong's literacy and free! There are many things to practice literacy and develop children's intelligence. There are also Chinese and mathematics related contents from grade one to grade six in primary schools, which are particularly comprehensive and classified by grade. Essential software for primary school learning, which can be printed directly! You can also print exercise books, red coated books and Schulte tables. There is no need to buy textbooks in the future. All of them can be printed directly in this software! And the content inside is constantly updated, which is quite easy to use! Free software!