During math interventions, I ground the foundation for 5th grade math in a strong understanding of numbers and number sense. I find that expanded form and written form of numbers, and repeated practice, helps student understand place value and what the different digits in a number mean.
This includes worksheets with steps and references and 30 task cards that correlate to the skills on the worksheets.
I recommend using the worksheets for reteach or teaching as needed and then adding the cards in slowly to your rotation or centers so that students are able to practice the skill. Task cards can also be used as spiral review.