Leon's 🟢 grammarCORE = the ONE RULE approach

About Leon's 🟢 grammarCORE = the ONE RULE approach

📗 ONE RULE ENGLISH: Why Grammar S*cks & How to Fix It 👉🏻 the One Rule approach ✔EMPOWERSEnglish language teachers and their students, ✔BOOSTS motivation, understanding and results, and .✔SAVES time. 👉🏻 ONE RULE = your tool

Keywords

• Efl Teaching
• Essential English Grammar Made Easy
• One Rule English
• One Rule Grammar
• One-Rule English
• One-Rule Grammar
• The One Rule Approach To Essential English Grammar: Grammarbob

Address

• Headquarters

  AmsterdamNoord-Holland, Netherlands

Team by function

Based on 2 public job profiles as of 4 September 2026.

• Education / Training1
• Founder / Owner1