K–8 STEM
Distance Learning
Products
Back
Science Books & Kits
Breakthrough Microscope
Games & Puzzles
Activity & Party Kits
Teacher's Packs
Course Purchasing Options
ScienceWiz Club
Portals to Discovery
Play Games
Hybrid Learning
Back
EXPLORE Hybrid Learning!
Afterschool
Back
Afterschool Programs OVERVIEW
Online Afterschool – INVENTIONS
Online Afterschool – ELECTRONICS
Online Afterschool – EXPLORING ENERGY
Online Afterschool – EXTREME MAGNETISM
Online Afterschool – LIGHT FANTASTIC
Classroom
Back
ScienceWiz for Teachers
Classroom Packs
NGSS STEM Progressions
Awards
Back
Chemistry
Electricity
Energy
Inventions
Light
Online Books
Login / Register
Chromosomes
What is a Chromosome?
How many do you have?
Video
