- Cognitive Flexibility
- Cognitive Functioning
- Cognitive Load
- Cognitive Models
- Cognitive Processes
- Cognitive Psychology
- Cognitive Research
- Cognitive Skills
- Cognitive Strategies
- Cognitive Structures
- Cognitive Style
- College
- Communalism
- Comorbidity
- Comprehension
- Computer Delivered Instruction
- Concept Development
- Concept Formation
- Concept of Word
- Concepts of Print
- Conceptual Change
- Conceptual Tempo
- Conduct Disorder
- Conscientiousness
- Consonant Inventory
- Consonants
- Content Area Reading
- Context Clues
- Conventions of Print
- Corrective Reading
- Country
- COVID-19 Impacts
- COVID-19 perceptions of risk
- Credentials
- Criterios de calidad de repositorios
- Critical Reading
- Cronbach Alpha
- Curiosity
- Data Analytics
- Datos de investigación
- Deaf or Hard of Hearing
- Decoding
- Demographics
- Departamentos
- Depression
- Developmental Delays
- Dialect
- Dictation
- Directionality
- Directorio