The Stuttering Foundation; great resource-https://www.stutteringhelp.org/
Great techniques a visuals-https://www.teacherspayteachers.com/Product/Fluency-Enhancing-Behaviors-FEBs-FREEBIE-878770
Home practice/techniques-https://www.teacherspayteachers.com/Product/Fluency-Brochure-5310597