Homeschool · Math and codes · Ages 9 and up
Code Practice
Convert between binary, octal, decimal and hex, add and subtract in binary and hex, read Morse by ear and by sight, and decode letter codes. Pick what to practice, then play a round or print a worksheet with an answer key.
Quick starts
Want a puzzle sheet with whole words? Try Mix-and-Match Worksheets: English, Latin, Morse, hex, binary and ASL.
New to number bases? Teach them step by step first, with beans, cups and a printable kit.
Or choose your own
Set up from Teach Number Bases Step by Step. Change anything below and press a quick start to try something else.
Need a refresher?
The Hexadecimal and Binary lessons explain each step, and the Morse code course teaches every letter by ear. When you’re ready for a challenge, try Code Quest.