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As of Sep 5, 2026, the average hourly pay for freelance powerhouse in the United States is $47.71, according to ZipRecruiter salary data. Most workers in this role earn between $24.28 and $61.78 per hour, depending on experience, location, and employer.
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Infographic showing various Freelance Powerhouse job openings in the United States as of August 2026, with employment types broken down into 88% Full Time, 9% Part Time, 2% Contract, and 1% Nights. Highlights an 92% Physical, 3% Hybrid, and 5% Remote job distribution, with an average salary of $99,230 per year, or $47.7 per hour.

Mad Science After School Program Instructor - Part Time

Mad Science

Vienna, VA • On-site

$75/hr

Part-time

Posted 5 days ago


Job description

Responsive recruiter
Part-Time STEM & Science After-School Instructor
Mad Science of DC delivers high-energy, hands-on STEM programs to elementary school students and we are looking for engaging instructors to lead our after-school programs.
Key Responsibilities
  • Pick up program materials weekly from our storage unit in McLean.
  • Transport gear safely to assigned school sites in NoVA.
  • Lead interactive 60-minute science classes for groups of 12-20 elementary students (K-6th grade).
  • Manage classroom decorum, foster curiosity, and ensure student safety.

Non-Negotiable Requirements Child Group Experience: Minimum 1 year leading groups of elementary-aged kids (e.g., classroom teaching, camp counselor, sports coaching, after-school care).
Reliable Vehicle & Drivers License: Must own a reliable car to transport weekly program kits to school locations.
Schedule Availability: Fully available during school dismissal hours (approx. 2:30 PM - 5:30 PM) at least 2 consistent weekdays per week.
Background Check: Must pass a state/federal criminal background check and child safety clearance.
Preferred (Not Required)
  • Background or interest in education, performing arts, or STEM fields.
  • Existing active school district clearances (FCPS & Arlington) - Bonus!

Why Join Us? Zero Lesson Planning: Complete, structured curriculum and equipment provided.
Competitive Hourly Equivalent: Earn $75 per class assignment.
Predictable Hours: Fixed afternoon schedules that fit around morning classes, freelance work, or evening commitments.
Ready to get started?
Email operations@madscienceofdc.com to join the lab!
Mad Science is a powerhouse brand with locations around the globe! For over 35 years, we have sparked imaginative learning through our summer camps, birthday parties, in-class workshops, after-school programs, and special events for kids ages 3-12. Become part of our team and help us inspire the next generation of scientists and engineers. Our locations are always looking for part-time instructors and full-time office staff.