Customer reviews

Check out what others are saying about the Lean Six Sigma - Yellow Belt course.

“I just finished taking the GoSkills Yellow Belt course and passed my IASSC exam on the first try with a 92%! This course is by the far the best organized and presented I've seen, at a better price.”

Karl Baedeker

“This is a great training program to study and use with other books on LSS yellow belt. I feel pretty confident that with a few more hours of study I can pass the IASSC yellow belt exam.”

Glenn Steinke

“I really enjoyed this course and I will highly recommended to any person. I will continue to study the attachments from each lesson until I can feel more confident to pass the IASSC Yellow Belt exam.”


“Really concise, practical and informative course; recommended either for new certifications or for refreshing.”

Jose Luis Sosa

“Ray was great!”

JR Ladson

“Useful information and knowledge for all industries to learn ”


“Very useful!!! Thanks, Ray Sheen and GoSkills group!!”

Sivaraman Hariharan

“Very interesting!!”



Amanda Daroga-Marajh

“Fantastic! I feel I have appropriately prepared for the certification through this program. Thank you!”


“Love the bite sized modules! Easy to squeeze one or two in when I have time.”


“The value of these courses in GoSkills are worth much more than they have charged me for. Best source for instructed self training online!”

Nicolo Alexis Duran

“Love this training! Lessons are presented by Ray Sheen who speaks clearly and professionally which makes this material easy to learn throughout the entire course. Following completion of the course, did 100% on final exam. Hoping to pass the IASSC exam. More to follow. Highly recommend taking this training through Go-Skills.”


“Very informative and loved that is was in short 5-7 minute burst. Was able to retain the information better and could work on it even when I didn't have a lot of free time. ”