Master number base conversions through interactive practice and repetition. This course walks you through converting between binary, decimal, and hexadecimal using step-by-step visual exercises on an interactive canvas, then reinforces your skills with six progressively challenging quizzes. You'll start by building intuition — filling in bits one at a time for decimal-to-binary, working through hex digits, and learning how 4-bit nibbles map directly to hexadecimal values. Then you'll test yourself across every conversion direction: decimal ↔ binary, binary ↔ hexadecimal, and mixed conversions that tie it all together. Designed for educators preparing for the FTCE Computer Science K–12 certification.