🏁 Conclusion

• Direct nibble mapping is the professional, fast path for Hex ↔ Binary.
• Keep everything grouped in 4-bit nibbles, pad with zeros on the left when needed.
• Use two-step (via decimal) to validate learning or when teaching base arithmetic foundations.
  With these skills, your students can confidently read bytes, registers, addresses, and encodings in real-world tools and labs. 🚀