Search	Terms
S17	S4 AND S9 AND S16
S16	S10 OR S11 OR S12 OR S13 OR S14 OR S15
S15	DE (‘Qualitative Research’ OR ‘Ethnography’ OR ‘Case Studies’ OR ‘Evaluation Methods’ OR ‘Field Studies’ OR ‘Focus Groups’ OR ‘Interviews’ OR ‘Mixed Methods Research’ OR ‘Naturalistic Observation’ OR ‘Participant Observation’ OR ‘Classroom Observation Techniques’ OR ‘Observation’ OR ‘Action Research’)
S14	AB (qualitative* OR ethnograp* OR ‘case stud*’ OR evaluation* OR ‘focus group*’ OR interview* OR ‘mixed method*’ OR observation*)
S13	TI (qualitative* OR ethnograp* OR ‘case stud*’ OR evaluation* OR ‘focus group*’ OR interview* OR ‘mixed method*’ OR observation*)
S12	DE (‘Effect Size’ OR ‘Control Groups’ OR ‘Experimental Groups’ OR ‘Experiments’ OR ‘Matched Groups’ OR ‘Quasiexperimental Design’ OR ‘Randomized Controlled Trials’ OR ‘Comparative Testing’ OR ‘Intervention’)
S11	AB (effect* OR trial* OR experiment* OR ‘control group*’ OR random* OR impact* OR compar* OR difference*)
S10	TI (effect* OR trial* OR experiment* OR ‘control group*’ OR random* OR impact* OR compar* OR difference*)
S9	S5 OR S6 OR S7 OR S8
S8	DE (‘Class Size’ OR ‘Small Classes’ OR ‘Teacher Student Ratio’)
S7	TX (group* OR class*) N5 (size*)
S6	AB (group* OR class*) AND AB (size* OR ratio*)
S5	TI (group* OR class*) AND TI (size* OR ratio*)
S4	S1 OR S2 OR S3
S3	DE (‘Special Needs Students’ OR ‘Special Schools’ OR ‘Residential Schools’ OR ‘Educationally Disadvantaged’ OR ‘Developmental Delays’ OR ‘Students with Disabilities’ OR ‘Special Classes’ OR ‘Special Education’ OR ‘Self Contained Classrooms’ OR ‘Resource Room’)
S2	AB (special*) AND AB (need* OR education OR child* OR student* OR pupil*)
S1	TI (special*) AND TI (need* OR education OR child* OR student* OR pupil*)