Catalog Timeline

41 named catalog events across 107 edition transitions (2017–2026). Curated major events include hand-written interpretations; remaining events have machine-generated observed summaries.

All entries sourced from WGU public catalog archive. Observed summaries describe what changed; interpreted summaries explain why. Confidence noted where applicable.

Major Events

10 curated events with hand-written titles and interpretations.

2017-01 → 2017-03Rename / CleanupSeverity Moderatehigh confidence

Pre-Clinical Title Standardization

Observed
14 genuine title changes; all are 'Pre-Clinical Experiences' → 'Preclinical Experiences' (hyphen removal). 13 program version changes also in this transition.
Interpretation
WGU standardized the hyphenation of 'Preclinical' across all teacher-education preclinical experience course titles. A concurrent wave of 13 program version bumps suggests this was part of a broader Education curriculum review cycle.
Schools: Business, Education, Health, Technology+7 / −13 courses13 version changes14 title changes
2017-05 → 2017-07CompositeSeverity Very Highhigh confidence

2017 Assessment Code Migration and Teacher Program Rationalization

Observed
175 course churn (largest in archive): 101 added, 74 removed. 22 program version changes. 7 net program change. Grade-band teacher programs retired; subject-discipline format introduced. Old AXX-format assessment codes retired; C-codes expand.
Interpretation
The single most structurally disruptive transition in the 2017–2026 archive. WGU simultaneously retired the legacy assessment code taxonomy (AXX-format codes such as ABP1, AEP1) and reorganized the Education school from grade-band programs (K-8, 5-12) toward subject-specific teacher programs. The 22 program version changes suggest comprehensive curriculum review coincided with this structural shift.
Schools: Education, Technology+101 / −74 courses22 version changes
2018-04 → 2018-05domain_reorganizationSeverity Very Highhigh confidence

Education School Domain Reorganization — Grade-Band to Subject-Discipline

Observed
23 program churn (largest in archive): 11 grade-band teacher programs retired (BASC9, BASCB12, BASCCH12…), 12 new subject-discipline programs added (BSCS, BSSEMG, BSSESB…). 61 course churn, 0 version changes.
Interpretation
WGU reorganized teacher education program structure from grade-band taxonomy (K-9, 5-12 etc.) to subject-discipline taxonomy (Science, Math, Social Studies, etc.). The structural change retired 11 programs and launched 12 replacements. Zero version changes indicates this was a program-taxonomy reorganization rather than a curriculum content revision.
Schools: Education, Health, Technology+40 / −21 courses
2018-05 → 2018-06domain_reorganizationSeverity Moderatehigh confidence

Education School Follow-On Reorganization Wave

Observed
12 program churn in Education; 4 course churn. Follow-on wave from the April→May 2018 domain reorganization.
Interpretation
Continuation of the 2018 Education school reorganization. Additional programs added and retired in the month immediately following the primary restructuring event, suggesting the April→May reorganization was rolled out in two phases.
Schools: Education+3 / −1 courses
2020-01 → 2020-02program_family_rebuildSeverity Highmoderate confidence

Business School Program Family Rebuild (BSBA)

Observed
13 program churn in Business only. 41 course churn. 0 version changes. Net program change: Business restructuring.
Interpretation
WGU restructured the Business school program family, retiring older BSBA variants and introducing new program codes with shared core curriculum. The zero version change count is consistent with a namespace migration rather than a content revision — the underlying curriculum may have been unchanged while programs were reorganized.
Schools: Business+21 / −20 courses
2020-06 → 2020-07curriculum_version_waveSeverity Highhigh confidence

Mid-Archive Curriculum Version Wave — Business, Education, Health

Observed
119 course churn, 18 version changes, 0 program count change. Affects Business, Education, Health schools.
Interpretation
A large curriculum-content refresh wave affecting three schools simultaneously with no structural program additions or removals. The 18 version changes indicate formal curriculum revision across many programs in the same cycle. The 119 course churn with zero program churn suggests course substitutions within existing programs rather than new program launches.
Schools: Business, Education, Health+54 / −65 courses18 version changes
2022-12 → 2023-01CompositeSeverity Highhigh confidence

Leavitt School of Health Rename and Curriculum Restructuring

Observed
80 course churn, 9 program churn, 2 genuine title changes. Affects Business, Health, Technology. Health school renamed from 'College of Health Professions' to 'Leavitt School of Health' effective this edition.
Interpretation
The Leavitt School of Health rename coincided with significant structural changes in the Health school — 9 program churn and 80 course churn together suggest the rename accompanied a broader health curriculum reorganization rather than being a pure administrative rename. The title changes for D346 and D347 ('Psychological Care' → 'Psychiatric Mental Health Care') reflect genuine course renaming within the health restructuring.
Schools: Business, Health, Technology+45 / −35 courses2 title changes
2024-08 → 2024-09CompositeSeverity Highhigh confidence

Certificate Formalization and BAES Program Launch

Observed
91 course churn, 13 program churn, 3 version changes. New 'Certificates - Standard Paths' section added with 16 cert programs and 52 unique course codes. Endorsement program restructuring; new D6xx course series. Notes: cert_section_added.
Interpretation
WGU added a formal 'Certificates - Standard Paths' section to the catalog for the first time, introducing 16 certificate programs with 52 dedicated course codes (all disjoint from Academic Programs). Simultaneously, endorsement programs in the Education school were restructured, introducing a new D6xx course code series and retiring older endorsement codes.
Schools: Business, Education, Technology+57 / −34 courses3 version changes
2024-09 → 2024-10curriculum_version_waveSeverity Highmoderate confidence

Post-Cert-Launch Curriculum Integration Wave

Observed
101 course churn, 5 program churn, 7 version changes. All 4 colleges affected.
Interpretation
The month following the certificate section launch saw the highest four-college course churn in the recent archive, suggesting a broad curriculum integration across all four schools that may have been coordinated with the structural changes from the prior month.
Schools: Business, Education, Health, Technology+46 / −55 courses7 version changes
2025-01 → 2025-02CompositeSeverity Very Highhigh confidence

Graduate CS/SWE Specialization Split and Education/Health Expansion

Observed
Severity 347 — highest in archive. 158 course churn (110 added, 48 removed), 14 program churn, 13 version changes. Education, Health, Technology schools affected.
Interpretation
The largest single-month expansion in the 2017–2026 archive by severity score. WGU launched multiple new graduate specialization tracks in Computer Science and Software Engineering (MSCS and MSSWE family programs), each with dedicated course series. Concurrent Health and Education program additions suggest a coordinated multi-school expansion rather than a single isolated program launch.
Schools: Education, Health, Technology+110 / −48 courses13 version changes

All Catalog Events

31 additional threshold-crossing transitions with observed summaries.

2018-06 → 2018-07domain_reorganizationLow

course_churn=11, programs_added=2, programs_removed=2, version_changes=1, title_changes=0, flags=['program_churn=4']

Education, Technology+9 / −2 courses
2018-08 → 2018-09domain_reorganizationModerate

course_churn=6, programs_added=4, programs_removed=4, version_changes=0, title_changes=0, flags=['program_churn=8']

Education+4 / −2 courses
2018-11 → 2018-12curriculum_version_waveLow

course_churn=11, programs_added=0, programs_removed=0, version_changes=9, title_changes=0, flags=['affected_college_count=3']

Business, Health, Technology+6 / −5 courses
2019-03 → 2019-04curriculum_version_waveLow

course_churn=20, programs_added=1, programs_removed=1, version_changes=1, title_changes=0, flags=['course_churn=20']

Education+13 / −7 courses
2019-08 → 2019-09curriculum_version_waveLow

course_churn=26, programs_added=1, programs_removed=0, version_changes=0, title_changes=0, flags=['course_churn=26']

Health+26 / −0 courses
2020-08 → 2020-09curriculum_version_waveLow

course_churn=14, programs_added=0, programs_removed=0, version_changes=10, title_changes=0, flags=['version_changes_count=10']

Business, Health+6 / −8 courses
2020-09 → 2020-10program_family_rebuildModerate

course_churn=69, programs_added=0, programs_removed=0, version_changes=9, title_changes=0, flags=['course_churn=69', 'affected_college_count=4']

Business, Education, Health, Technology+39 / −30 courses
2020-10 → 2020-11program_family_rebuildModerate

course_churn=53, programs_added=2, programs_removed=2, version_changes=8, title_changes=0, flags=['course_churn=53', 'program_churn=4', 'affected_college_count=4']

Business, Education, Health, Technology+44 / −9 courses
2020-11 → 2020-12curriculum_version_waveModerate

course_churn=43, programs_added=2, programs_removed=1, version_changes=8, title_changes=0, flags=['course_churn=43', 'affected_college_count=4']

Business, Education, Health, Technology+9 / −34 courses
2021-08 → 2021-09curriculum_version_waveLow

course_churn=18, programs_added=0, programs_removed=2, version_changes=7, title_changes=0, flags=['affected_college_count=3']

Business, Education, Health+13 / −5 courses
2021-12 → 2022-01curriculum_version_waveLow

course_churn=29, programs_added=2, programs_removed=0, version_changes=4, title_changes=0, flags=['course_churn=29']

Business, Health+21 / −8 courses
2022-04 → 2022-05curriculum_version_waveLow

course_churn=37, programs_added=1, programs_removed=1, version_changes=0, title_changes=0, flags=['course_churn=37']

Technology+30 / −7 courses
2022-05 → 2022-06curriculum_version_waveLow

course_churn=21, programs_added=3, programs_removed=0, version_changes=2, title_changes=0, flags=['course_churn=21']

Education, Technology+19 / −2 courses
2022-11 → 2022-12program_family_rebuildModerate

course_churn=60, programs_added=2, programs_removed=1, version_changes=0, title_changes=0, flags=['course_churn=60']

Business, Health+34 / −26 courses
2023-01 → 2023-02curriculum_version_waveLow

course_churn=20, programs_added=0, programs_removed=0, version_changes=2, title_changes=2, flags=['course_churn=20', 'affected_college_count=3']

Business, Health, Technology+12 / −8 courses
2023-03 → 2023-04curriculum_version_waveModerate

course_churn=35, programs_added=2, programs_removed=1, version_changes=0, title_changes=1, flags=['course_churn=35']

Business, Health+23 / −12 courses
2023-04 → 2023-05curriculum_version_waveLow

course_churn=24, programs_added=2, programs_removed=0, version_changes=2, title_changes=0, flags=['course_churn=24']

Health, Technology+10 / −14 courses
2023-07 → 2023-08domain_reorganizationModerate

course_churn=43, programs_added=3, programs_removed=2, version_changes=1, title_changes=0, flags=['course_churn=43', 'program_churn=5', 'affected_college_count=3']

Business, Health, Technology+18 / −25 courses
2023-11 → 2023-12program_family_rebuildModerate

course_churn=53, programs_added=1, programs_removed=0, version_changes=16, title_changes=0, flags=['course_churn=53', 'version_changes_count=16']

Education, Technology+12 / −41 courses
2023-12 → 2024-01curriculum_version_waveLow

course_churn=15, programs_added=0, programs_removed=0, version_changes=2, title_changes=0, flags=['affected_college_count=3']

Business, Health, Technology+14 / −1 courses
2024-01 → 2024-02curriculum_version_waveLow

course_churn=24, programs_added=2, programs_removed=0, version_changes=2, title_changes=0, flags=['course_churn=24']

Health, Technology+24 / −0 courses
2024-03 → 2024-04curriculum_version_waveLow

course_churn=4, programs_added=1, programs_removed=0, version_changes=5, title_changes=2, flags=['affected_college_count=3']

Education, Health, Technology+3 / −1 courses
2024-05 → 2024-06program_family_rebuildModerate

course_churn=57, programs_added=4, programs_removed=1, version_changes=1, title_changes=0, flags=['course_churn=57', 'program_churn=5', 'affected_college_count=3']

Business, Health, Technology+37 / −20 courses
2024-07 → 2024-08domain_reorganizationModerate

course_churn=21, programs_added=4, programs_removed=0, version_changes=1, title_changes=1, flags=['course_churn=21', 'program_churn=4', 'affected_college_count=4']

Business, Education, Health, Technology+21 / −0 courses
2024-12 → 2025-01domain_reorganizationModerate

course_churn=8, programs_added=4, programs_removed=4, version_changes=0, title_changes=0, flags=['program_churn=8']

Business, Education+7 / −1 courses
2025-02 → 2025-03program_family_rebuildModerate

course_churn=53, programs_added=0, programs_removed=5, version_changes=0, title_changes=0, flags=['course_churn=53', 'program_churn=5']

Education+0 / −53 courses
2025-06 → 2025-07domain_reorganizationModerate

course_churn=16, programs_added=7, programs_removed=0, version_changes=1, title_changes=0, flags=['program_churn=7']

Education, Technology+12 / −4 courses
2025-07 → 2025-08program_family_rebuildModerate

course_churn=20, programs_added=4, programs_removed=5, version_changes=2, title_changes=0, flags=['course_churn=20', 'program_churn=9']

Business, Technology+11 / −9 courses
2025-11 → 2025-12curriculum_version_waveLow

course_churn=22, programs_added=0, programs_removed=0, version_changes=1, title_changes=0, flags=['course_churn=22']

Health+10 / −12 courses
2026-01 → 2026-02domain_reorganizationModerate

course_churn=39, programs_added=3, programs_removed=3, version_changes=1, title_changes=0, flags=['course_churn=39', 'program_churn=6']

Education, Technology+20 / −19 courses
2026-02 → 2026-03curriculum_version_waveLow

course_churn=1, programs_added=0, programs_removed=0, version_changes=18, title_changes=0, flags=['version_changes_count=18']

Business, Education+0 / −1 courses