Certain material is incorporated by reference into this part with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. All approved incorporation by reference (IBR) material is available for inspection at the Department of Education (the Department) and the National Archives and Records Administration (NARA). Contact the Department at: Institute of Education Sciences, National Center for Education Evaluation and Regional Assistance, 550 12th Street SW, PCP-4158, Washington, DC, 20202-5900; phone: (202) 245-6940; email: Contact.WWC@ed.gov. For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email fr.inspection@nara.gov. The following material may be obtained from Institute of Education Sciences, 550 12th Street SW, Washington, DC, 20202; phone: (202) 245-6940; website: http://ies.ed.gov/ncee/wwc/Handbooks.

1. (a) What Works Clearinghouse Procedures and Standards Handbook, WWC 2022008REV, Version 5.0, August 2022; Revised December 2022; IBR approved for § 77.1.
2. (b) What Works Clearinghouse Standards Handbook, Version 4.1, January 2020, IBR approved for § 77.1.
3. (c) What Works Clearinghouse Procedures Handbook, Version 4.1, January 2020, IBR approved for § 77.1.
4. (d) What Works Clearinghouse Standards Handbook, Version 4.0, October 2017, IBR approved for § 77.1.
5. (e) What Works Clearinghouse Procedures Handbook, Version 4.0, October 2017, IBR approved for § 77.1.
6. (f) What Works Clearinghouse Procedures and Standards Handbook, Version 3.0, March 2014, IBR approved for § 77.1.
7. (g) What Works Clearinghouse Procedures and Standards Handbook, Version 2.1, September 2011, IBR approved for § 77.1.

[89 FR 70343, Aug. 29, 2024]