The cost of 6th-grade tutoring in Washington, DC, can vary widely based on factors such as the tutor's qualifications, experience, and the tutoring setting (private, group, in-person, or online). Generally, prices can range from about $25 to $80 per hour. Some tutors might offer package deals or sliding scale fees based on financial need, which can affect the overall cost. Additionally, many tutoring centers and private tutors in the area might provide tailored pricing, so it's beneficial to shop around and compare options to find the best fit for your needs and budget.