Skip count, multiply, and divide whole numbers subsequence

Note that Khan Academy has skip-counting by 5s and 10s in 2nd grade. For 3rd grade, Khan Academy jumps right into multiplication. For example, 3 groups of 7 is 7 + 7 + 7 = 3 * 7. IXL has skip-counting by 2s, 5s, and 10s in 1st, 2nd, and 3rd grade. I think 1st graders could skip-count by 2s, 5s, and 10s. Then 2nd graders could tackle skip-counting in 3s, and 4s. Then 3rd graders could continue as usual with multiplication.