Below is how the official curriculum organizes it. Each strand will get full lessons like the ones in Grade 1 Mathematics.
Count by 1s forward and back, by 2s to 20, by 5s and 10s to 100; numbers to 20 (represent, compare, 1 or 2 more/less); Addition and subtraction to 20 with story problems; mental strategies (counting on, making 10, doubles) for facts to 18