---
type: "Bill"
title: "Replace High School Social Studies Assessment"
description: "The act removes the requirement that a state assessment in social studies be administered to high school students."
jurisdiction: "us/states/co"
legislature: "Colorado General Assembly"
session: "2020A"
identifier: "HB 20-1135"
citation: "Colorado HB 20-1135 (2020A)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Barbara McLachlan", "Nancy Todd", "Paul Lundeen", "Perry Buck"]
version_count: 10
action_count: 17
vote_count: 4
first_action: "2020-01-16T07:00:00+00:00"
last_action: "2020-07-13T06:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/91a1a2aa-32e7-4d12-a251-5f9bf00e44b7"
source_url: "http://leg.colorado.gov/bills/hb20-1135"
source_hash: "4cb657c19f49c81e901f9577f0f17e6067d4c6ab2e2d1cf6be215f62aefb68cb"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-co"]
---

# Colorado HB 20-1135 (2020A) — Replace High School Social Studies Assessment

The act removes the requirement that a state assessment in social studies be administered to high school students.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Committee Amendment** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/2020a_hb1135_s_app_002.pdf)
2. **Engrossed (02/20/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/documents/2020A/bills/2020a_1135_eng.pdf)
3. **Final Act (07/02/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/documents/2020A/bills/2020a_1135_enr.pdf)
4. **Introduced (01/16/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/documents/2020A/bills/2020a_1135_01.pdf)
5. **PA1 (02/18/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/documents/2020A/bills/2020a_1135ed_01.pdf)
6. **PA2 (03/13/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/documents/2020A/bills/2020a_1135sapp_01.pdf)
7. **Reengrossed (02/21/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/documents/2020A/bills/2020a_1135_ren.pdf)
8. **Rerevised (06/01/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/documents/2020A/bills/2020a_1135_rer.pdf)
9. **Revised (05/28/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/documents/2020A/bills/2020a_1135_rev.pdf)
10. **Signed Act (07/13/2020)** (committee substitute) — [source](http://leg.colorado.gov/sites/default/files/2020a_1135_signed.pdf)

## Votes

- CONCUR — **63–0** (pass) · lower
- BILL — **35–0** (pass) · upper
- REPASS — **63–0** (pass) · lower
- BILL — **60–0** (pass) · lower

## Sponsors

- Barbara McLachlan — primary (person)
- Nancy Todd — primary (person)
- Paul Lundeen — primary (person)
- Perry Buck — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2020-07-13T06:00:00+00:00** Governor Signed `executive-signature`
- **2020-07-02T06:00:00+00:00** Sent to the Governor `executive-receipt`
- **2020-07-02T06:00:00+00:00** Signed by the President of the Senate
- **2020-07-02T06:00:00+00:00** Signed by the Speaker of the House
- **2020-06-10T06:00:00+00:00** House Considered Senate Amendments - Result was to Concur - Repass
- **2020-06-02T06:00:00+00:00** House Considered Senate Amendments - Result was to Laid Over Daily
- **2020-06-01T06:00:00+00:00** Senate Third Reading Passed - No Amendments `reading-3, passage`
- **2020-05-28T06:00:00+00:00** Senate Second Reading Passed with Amendments - Committee `reading-2`
- **2020-05-26T06:00:00+00:00** Senate Second Reading Laid Over Daily - No Amendments
- **2020-03-13T06:00:00+00:00** Senate Committee on Appropriations Refer Amended - Consent Calendar to Senate Committee of the Whole `committee-passage`
- **2020-03-05T07:00:00+00:00** Senate Committee on Education Refer Unamended to Appropriations `referral-committee`
- **2020-02-24T07:00:00+00:00** Introduced In Senate - Assigned to Education `introduction`
- **2020-02-21T07:00:00+00:00** House Third Reading Passed - No Amendments `reading-3, passage`
- **2020-02-20T07:00:00+00:00** House Second Reading Passed with Amendments - Committee `reading-2`
- **2020-02-19T07:00:00+00:00** House Second Reading Laid Over Daily - No Amendments
- **2020-02-13T07:00:00+00:00** House Committee on Education Refer Amended to House Committee of the Whole `committee-passage, referral-committee`
- **2020-01-16T07:00:00+00:00** Introduced In House - Assigned to Education `introduction`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/91a1a2aa-32e7-4d12-a251-5f9bf00e44b7`. Confidence: reported (aggregated from official Colorado legislature records).