-
1.
Australian Education Index (AEI)
-
2.
British Education Index (BEI)
-
3.
The Campbell Collaboration Social, Psychological, Educational and Criminological Trials Register (C2‐SPECTR)
-
4.
BMJ controlled trials
-
5.
CBCA Education (Canada)
-
6.
-
7.
Criminal Justice Abstracts
-
8.
Cochrane Central Register of Controlled Trials (CENTRAL)
-
9.
Database of Abstracts of Reviews of Effects (DARE)
-
10.
Dissertation Abstracts
-
11.
Educational Resources Information Centre (ERIC)
-
12.
EThOS (Beta)
-
13.
EMBASE
-
14.
Google
-
15.
Google Scholar
-
16.
Index to Theses Database
-
17.
Institute of Education Sciences ‐ What Works Clearinghouse
-
18.
ISI Web of Knowledge
-
19.
MEDLINE
-
20.
The National Dropout Prevention Centre/Network
-
21.
The Netherlands National Trial Register (NTR)
-
22.
Open Grey
-
23.
Psych INFO
-
24.
Sociological Abstracts
-
25.
Social Sciences Citation Index (SSCI)
-
26.
Scientific Electronic Library Online (SciELO). Electronic database collecting scientific production from developing countries (Spanish and Portuguese)
-
27.
World Health Organisation International Clinical Trials Registry (WHO ICTRP)