I have been teaching Excel since the mid-1990s (from Excel 5.0) and have been a Master Instructor and Microsoft Certified Trainer. Most importantly of all, I have done a lot more than 10,000 hours as a trainer. I have written 8 books on Excel. I have not always been an Excel head. My first job was in Cameroon as an accounting teacher. I had never taught before but I was 21 and knew no better. I have got to Grade III on the oboe but only the tone deaf would want to listen to me.
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