Cross Cultural Developmental Educational Services

Education Consulting for Today's Schools


Specializing in Special Education, MTSS/RTI, ELL, and Gifted Education 

CCDES is a company founded by Dr. Catherine Collier in 1987 to provide services and products for improving the education of culturally and linguistically diverse learners with learning and behavior challenges.  Dr. Sheri Collier, Catherine's niece, started assisting with presentations, products, and workshops in the early 2000's and is working to bring a gifted education focus to the business. 

Headquartered in suburbs of Denver, Colorado, CCDES specializes in bringing you the services, support, and expertise you need. Whether you represent a school or a district, or if you are a teacher or a principal, CCDES can deliver workshops remotely or in-person as well as provide hands-on instruction on the tools and processes we provide. We bring extensive experience and professionalism to every customer and customize our support to your individual needs and concerns.

Get in touch with us to set up a consultation, or use the contact form at the bottom of this page to find out if our services are right for you.




13488 Vine St
Thornton, CO 80241


(303) 378-8090


                                               Areas of Practice

Workshops and trainings

CCDES experts routinely provide in-person training on our products and services. If in-person doesn't fit your budget or schedule, CCDES can utilize web services for online workshops as well. Use the contact us form at the bottom of the page to request your date today! 

Education is the most powerful weapon which you can use to change the world.
— Nelson Mandela

products and services

CCDES has a wide range of products and services to assist your staff, school, and district with your specialized needs. Books such as "RTI for Diverse Learners", "Seven Steps for Separating Difference from Disability", and many more assist CCDES experts in creating the solution you need. 


Let's Talk.

Use the form below to contact us if you have a question or a comment. Please be as detailed as possible. If you'd like to schedule Dr. Collier for a presentation, please include the requested dates and location. You may also email or call us.

For sales, please email us with the product(s) and quantity you need. 

Name *
Please do not include confidential or sensitive information in your message.