There are many sites available for HVACR training.  In fact, the number has grown so large as to make provider selection confusing.  The list on this page is certainly not exclusive but it does include credible sources.  These are nationally known and vetted sites that are worth your look.  We are not aware of any nationally known sites that have been issued Arkansas Continuing Education Numbers ;but, they are still excellent sources of good information.  The formating to make them online and approved is a bit complicated so if you need Arkansas CEU for license renewal, just go with the State's website or use classes offered by the Association. 

View the sites by clicking on the logo.  All have a plethroia of information available.  Search each one. thoroughly.

National Training Sites

The Air Conditioning Contractors of America represents the HVACR industry in congress as well as with regulatory and code authorities.  They provide comprehensive training; and, you will probably notice, they write many of the Manuals referenced by code authorities.  This link will take you to the HVAC Blog.  It is is focused on helping professional contractors run smarter, better businesses. Led by contractors themselves, who know firsthand the technology and cultural changes that are transforming old-school trades into a high-tech, dynamic, and driven industry.
ACCA has certified over 300,000 people for EPA608.  With online and written training, ACCA can also certify a designated person to serve as a proctor. 
 ACCA Skill Builder provides succinct videos and narratives of a variety of technical and people skills.
"HVAC Excellence is a standards organization dedicated to improving the quality of education in the HVACR Industry."  If you are interested in improving the outcomes of your local HVACR training program and becoming accreditated, HVAC Excellence is an excellent source. 
 Best known for their 608 EPA Certification Program, Esco provides training online and through many companies and educational institutions. ESCO has the most current information regarding A2L and practice tests for the 608.  If you need a 608 Certification, contacting ESCO is an excellent source.  
"The HVACR Learning Network offers on-demand, online content from industry leading organizations, authors, and publishers.  It is an excellent source for digital content that is reliable, up-to-date, and relevant, directly from trusted sources. 
Founded by Bryan Orr of Kalos Services, HVAC School is grounded on the mission of providing training "For Techs by Techs".  Not subject goes unturned.  HVAC School may be the most watched training program on the web.  When you access this site be thorough because there is much to see and learn.  You can watch podcasts or take courses.  Bryan also hosts a Training Symposium each spring.  It is affordable but you will need to register early.  The seats go fast.
Jim Bergmann is a friend of the Association and one of the most prolific inventors, designers, writers and YouTube broadcasers in the HVACR industry.  He is leading the country toward commissioning procedures that will assure that equipment is working to its designed capacity and efficiency.  His measureQuick software and diagnostic system makes every tech an expert.  Following Jim on YouTube will reduce costs, increase revenue and customer satisfaction.  Each video is an eye opener.  This link will take you to a YouTube search for Jim.  Once there, just keep scrolling and make Jim a regular trainer for you and within your company.
Craig Migliaccio, licensed HVACR teacher, owner of a HVAC company, and now founder and principle trainer with AC Service Tech, LLC.  Craig's approach is to be thorough but to present concepts and practices in an undertandable manner that makes following his instruction easy and repeatable.  He is author of an excellent book, Refrigerant Charging and Service Procedures for Air Conditioning, which should be in every person's library, both new and experienced techs.  This link take you to his site where you can read his articles and view his videos. 
NATE is the nation's largest nonprofit certification organization for heating, ventilation, air conditioning, and refrigeration tehnicians.  Begin the certificaion process and set yourself apart in the industry.