Speech-language pathologists can earn the Certificate of Clinical Competence in Speech-Language Pathology (CCC-SLP), offered by the American Speech-Language-Hearing Association. Certification satisfies some or all of the requirements for state licensure and may be required by some employers.
The effect of lavender on sleep has also been studied. The inhaling of lavender odour during sleep has been observed to reduce the respiration frequency (you breathe in and out less), which is commonly used as an indicator of relaxation and sleep depth.
You can start lavender from hardwood or softwood cuttings. Softwood cuttings are taken from the soft, pliable tips of new growth. Hardwood is thicker than softwood and resists bending. It may snap off if you force it to bend.