### Mega Math Practice 1.NBT.1 introduces the Numbers and Base Ten standard by giving your students a lot of practice counting on to 120 from any number and one to one correspondence. 1NBT.1 is all about learning creating a solid foundation in counting and number sense to 120. Gaining a foundation with this practice will give your kiddos a head start on the rest on the work in the NBT standard. Students need many opportunities to work with all new math skills.