Transitioning from full-time school to homeschool without a rocky deschooling period?

One month of deschooling per year of schooling is the rule of thumb. For a 10-year-old: expect five months.

During deschooling, follow the child completely. Observe what he chooses when left free. Those choices are the data you need.

Keep it low pressure for the first term. One formal subject only - his strongest - so that learning feels like success.

Visit museums, nature reserves, interesting places. Let the world do the teaching. After six months children are hungry for more structured learning.