English proficiency is one of the major factors affecting international students’ academic adjustment to American universities. Many international college students select to improve their academic English proficiency through an English intensive program. Collaborative learning is an educational approach to teaching and learning that allows students and teachers to engage in a common task and work together to search for knowledge and skills. This thesis study aims to develop, design, and iteratively refine strategies to help English intensive program teachers build collaborative learning and promote international students’ effective collaboration, so as to improve students' academic English proficiency. In this study, two different collaborative learning strategies were designed, implemented and iterated. Data was collected using qualitative methods and follow the principle of design-based research (DBR; Barab, 2014) The results of this study suggest that successful instructional strategies for collaborative learning should be designed in the following ways. First, gathering participants’ opinions and feedback at all phases of design and iteration; Second, linking the new strategies or activity to students’ grade should be the center of the design. Third, in DBR，researchers need to be patient to build good relationships with practitioners, which can provide a basis for continuing research.

In this dissertation I design, implement and conduct a mixed methods action research project to develop intercultural competence in domestic university staff members. My research took place at my place of employment, a research one university in the American southwest. As the director of an international student service center, I had direct observations of the interactions between domestic staff members and our international students with lower English proficiency. With the observations came the realization that this communication could be both more effective and more efficient. To address this problem, I developed three workshops to provide participants with the skills to have more productive communication with their students. I used a mixed methods approach to investigate how this innovation influenced the three constructs associated with intercultural competence: cultural awareness, cultural empathy and language modification.

Quantitative data consisted of both pre- and post-intervention surveys. Results relating to all three constructs showed significant gain between the pre-intervention and post-intervention surveys. Analysis of the qualitative data engendered four assertions. 1. As staff members learned more about a student’s culture, they become more cognizant of the communication strategies they used and become confident they could reduce conflict, ill-communication and miscommunication between students and staff member. 2. Staff members were not aware of the complexities of the English language. 3. Only after understanding the difficulties non-native English speakers face do the staff members truly understand the student experience and become willing to make sincere efforts to communicate more effectively. 4. It is incumbent on the staff member to everything possible to facilitate a successful interaction with the student.

This mixed methods classroom research examined if accountability groups in the lower proficiency levels of a university intensive English program would improve students’ language acquisition. Students were assigned partners for the study period with whom they completed assignments inside and outside of class, as well as set goals for use of language in their own context. Based in the ecological perspective and socio- cultural theory, activities reinforced social bonds, scaffolded the learning objectives in a communicative way, modeled the transfer of knowledge to the world outside the classroom, and allowed students to create new affordances in which to practice and use the language. Analysis of qualitative data from interviews, text messages, exit slips, and field notes, as well as quantitative data from student academic records, pre and post tests of curricular objectives, and pre and post attitudinal surveys, showed that students were developing a stronger sense of autonomy in their language learning. They viewed their peers and themselves as knowledgeable others, helping one another to learn vocabulary and structures in each student’s zone of proximal development. Learner engagement in the treatment groups, as measured by classroom attendance, increased over a control group, as did overall grade averages in all courses. Students with no previous time in the program showed more improvement than those who had been in the program for at least one session prior. Students also showed increased fluency, as measured by the word count on a constructive task in the pre- and post-test of curricular objectives.