TeamBasedInquiryLearning · siwelwerd · Feb 5, 2026 · Feb 17, 2026 · Feb 20, 2026 · Feb 20, 2026
diff --git a/project.ptx b/project.ptx
@@ -142,6 +142,15 @@
       output-filename="TBIL-Linear-Algebra-Slides.pdf" >
       <stringparams debug.project.number="the-way-it-should-be"/>
     </target>
+    <!-- For printing by 619 Wreath-->
+    <target
+      name="linear-algebra-print-619"
+      format="pdf"
+      source="linear-algebra/source/main.ptx"
+      publication="publication-619.ptx"
+      output-filename="TBIL-Linear-Algebra-619.pdf" >
+      <stringparams debug.project.number="the-way-it-should-be"/>
+    </target>
 
   </targets>
 </project>
diff --git a/publication/instructor.ptx b/publication/instructor.ptx
@@ -35,7 +35,7 @@
     <!-- See
     https://pretextbook.org/doc/guide/html/publication-file-source.html#publication-file-source-version -->
     <!-- <version include="videos labs"/> -->
-    <version include="instructor nonpreview instructor-nonpreview"/>
+    <version include="instructor nonpreview instructor-nonpreview html"/>
   </source>
 
   <numbering>

diff --git a/publication/preview.ptx b/publication/preview.ptx
@@ -35,7 +35,7 @@
     <!-- See
     https://pretextbook.org/doc/guide/html/publication-file-source.html#publication-file-source-version -->
     <!-- <version include="videos labs"/> -->
-    <version include="instructor preview"/>
+    <version include="instructor preview html"/>
   </source>
 
   <numbering>

diff --git a/publication/publication-619.ptx b/publication/publication-619.ptx
@@ -0,0 +1,127 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- This is the publication file for a newly generated PreTeXt book.     -->
+<!-- By changing the values of attributes here, you can change how        -->
+<!-- the output looks and functions.  For the complete documentation      -->
+<!-- of publication-file options, see                                     -->
+<!-- https://pretextbook.org/doc/guide/html/publisher-file-reference.html -->
+
+<publication>
+  <common>
+    <!-- Level at which are html files generated (chapter/section/etc): -->
+    <chunking level="2" />
+    <!-- Depth for table of contents.  0 means no TOC -->
+    <tableofcontents level="2" />
+    <!-- Visibility of exercise components where they first appear.          -->
+    <!-- There are four components (statement/hint/answer/solution) for each -->
+    <!-- of five exercise types (inline/divisional/worksheet/reading/        -->
+    <!-- project). Some examples:                                            -->
+    <exercise-inline statement="yes" hint="yes" answer="no" solution="no" />
+    <exercise-divisional statement="yes" hint="yes" />
+    <exercise-project statement="yes" hint="yes" answer="no" solution="no" />
+    <!-- Style of fill-in-the-blanks: -->
+    <fillin textstyle="underline" mathstyle="shade" />
+    <!-- You can set a watermark: -->
+    <!-- <watermark scale="0.5">DRAFT</watermark> -->
+  </common>
+
+
+  <!-- Set where external assets and generated assets will be   -->
+  <!-- stored or created.  Directories are relative to the main -->
+  <!-- source PreTeXt file                                      -->
+  <source>
+    <directories external="../../../assets" generated="../generated-assets" />
+    <!-- Set which marked elements are included in this version: -->
+    <!-- See
+    https://pretextbook.org/doc/guide/html/publication-file-source.html#publication-file-source-version -->
+    <!-- <version include="videos labs"/> -->
+    <version include="main nonpreview"/> 
+  </source>
+
+  <numbering>
+    <!-- the divisions element describes the numbering of divisions.  -->
+    <!-- @part-structure should be "decorative" or "structural",      -->
+    <!-- were the latter would restart numbering chapters within each -->
+    <!-- part (this only matters if your book has parts).             -->
+    <!-- The attribute @chapter-start give the number of the first    -->
+    <!-- chapter.  @level says how deep (chapter->section->subsection)-->
+    <!-- numbering should appear.                                     -->
+    <!-- For use with a book organized by part, you can set the -->
+    <!--  @part-structure to "decorative" or "structural" -->
+    <!-- <divisions part-structure="decorative" chapter-start="1" level="3"/> -->
+    <!-- The next elements say how the levels deep to break up the    -->
+    <!-- numbering of the respective elements. Can't be more than the -->
+    <!-- @level on divisions above.                                   -->
+    <blocks level="2" />
+    <projects level="2" />
+    <equations level="2" />
+    <footnotes level="2" />
+  </numbering>
+
+  <!-- LaTeX specific options: set @print="yes" to get pdf set up   -->
+  <!-- for printing; set @sides="two" if the printing woudl be two- -->
+  <!-- sided.  @pageref="yes/no" controls whether page number are   -->
+  <!-- included in cross-references                                 -->
+  <latex print="yes" font-size="12" draft="no">
+    <page>
+      <geometry>papersize={7in,10in},margin=1in</geometry>
+    </page>
+    <asymptote links="no" />
+
+  </latex>
+
+  <html>
+    <platform host="web"/>
+    <!-- The host above could also be "runestone" -->
+
+    <!-- Whether to knowl a particular elements is set here    -->
+    <!-- Lots of elements have this possibility; see the guide -->
+    <knowl
+      theorem="no"
+      proof="yes"
+      definition="no"
+      example="no"
+      example-solution="yes"
+      project="no"
+      task="no"
+      remark="no"
+      objectives="no"
+      outcomes="no"
+      figure="no"
+      table="no"
+      listing="no"
+      list="no"
+      exercise-inline="yes"
+      exercise-divisional="no"
+      exercise-worksheet="no"
+      exercise-readingquestion="no"
+    />
+
+    <css theme="denver" palette="leaves"/>
+    <!-- Search can be default or none, or you can use a Google-cx number to use google's search
+    feature (but then variant should be set to none to avoid conflict) -->
+    <search variant="default" />
+    <!-- Embedded calculators.  For math, this could be geogebra-classic, geogebra-graphing,
+    geogebra-geometry, and geogebra-3d.  For ActiveCode, you can specify a language (python,
+    javascript, etc).  -->
+    <calculator model="none" activecode="none" />
+    <!-- Set the base URL of where the online version is hosted to have links in other formats -->
+    <baseurl href="https://tbil.org"/>
+    <!-- Control behavior of online WeBWorK, per type: -->
+    <webwork
+      inline="dynamic"
+      divisional="static"
+      reading="static"
+      worksheet="static"
+      project="dynamic"
+    />
+    <!-- Magic IDs identify HTML pages to analytics services   -->
+    <!-- Presence implies relevant Javascript will be added    -->
+    <!-- StatCounter requires both values to be set            -->
+    <!-- <analytics google-gst="UA-0123456-1" statcounter-project="0123456"
+    statcounter-security="0123456"/> -->
+  </html>
+
+  <!-- To use WeBWorK, you need a server.  -->
+  <!-- <webwork server="https://webwork-ptx.aimath.org"> -->
+</publication>
diff --git a/publication/publication.ptx b/publication/publication.ptx
@@ -35,7 +35,7 @@
     <!-- See
     https://pretextbook.org/doc/guide/html/publication-file-source.html#publication-file-source-version -->
     <!-- <version include="videos labs"/> -->
-    <version include="main nonpreview"/> 
+    <version include="main nonpreview html"/> 
   </source>
 
   <numbering>

diff --git a/source/common/authors/lewis.ptx b/source/common/authors/lewis.ptx
@@ -1,5 +1,6 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <author xmlns:xi="http://www.w3.org/2001/XInclude">
     <personname>Drew Lewis</personname>
+    <institution>Center for Grading Reform</institution>
     <email>drew.lewis@gmail.com</email>
 </author>
diff --git a/source/linear-algebra/source/01-LE/01.ptx b/source/linear-algebra/source/01-LE/01.ptx
@@ -1016,7 +1016,7 @@ Augmented matrix:
                         <li>For <m>a,b, \in \mathbb{R}</m>, <m>a \sim b</m> if an only if <m>|a|=|b|</m>.</li>
                         </ul></p></statement></exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-LE1"/>.

diff --git a/source/linear-algebra/source/01-LE/02.ptx b/source/linear-algebra/source/01-LE/02.ptx
@@ -944,7 +944,7 @@ rref(A)
             </statement></exploration>
     </subsection>
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-LE2"/>.

diff --git a/source/linear-algebra/source/01-LE/03.ptx b/source/linear-algebra/source/01-LE/03.ptx
@@ -474,7 +474,7 @@ different solutions. We'll learn how to find such solution sets in
                     </statement>
                 </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-LE3"/>.

diff --git a/source/linear-algebra/source/01-LE/04.ptx b/source/linear-algebra/source/01-LE/04.ptx
@@ -437,7 +437,7 @@ Explain how to describe this solution set using set notation.
 <li> Suppose that a linear system has five equations and three unknowns and that the coefficient matrix has a pivot in every column. Then the linear system is consistent and has a unique solution.</li></ul></p></statement></exploration>
     </subsection>    
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-LE4"/>.

diff --git a/source/linear-algebra/source/02-EV/01.ptx b/source/linear-algebra/source/02-EV/01.ptx
@@ -579,7 +579,7 @@ We can do this in a few parts. I've used bullets here to indicate all that needs
                     </statement>
     </exploration>
 </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-EV1"/>.

diff --git a/source/linear-algebra/source/02-EV/02.ptx b/source/linear-algebra/source/02-EV/02.ptx
@@ -556,7 +556,7 @@ Given no additional information about the vectors <m>\vec{v}_1,\dots, \vec{v}_m<
         </p>
     </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-EV2"/>.

diff --git a/source/linear-algebra/source/02-EV/03.ptx b/source/linear-algebra/source/02-EV/03.ptx
@@ -1113,7 +1113,7 @@ Is it possible that there is a subset of <m>V</m> containing fewer vectors than
 </p></exploration>
     </subsection>
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-EV3"/>.

diff --git a/source/linear-algebra/source/02-EV/04.ptx b/source/linear-algebra/source/02-EV/04.ptx
@@ -651,7 +651,7 @@ vectors that can form a linearly independent set?
     </exploration>
     </subsection>
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-EV4"/>.

diff --git a/source/linear-algebra/source/02-EV/05.ptx b/source/linear-algebra/source/02-EV/05.ptx
@@ -599,7 +599,7 @@ Must a basis for the space <m>P_2</m>, the space of all quadratic polynomials, c
     </exploration>
     </subsection>
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-EV5"/>.

diff --git a/source/linear-algebra/source/02-EV/06.ptx b/source/linear-algebra/source/02-EV/06.ptx
@@ -477,7 +477,7 @@ Thus the basis for a subspace is not unique in general.
         </p></exploration>
     </subsection>
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-EV6"/>.

diff --git a/source/linear-algebra/source/02-EV/07.ptx b/source/linear-algebra/source/02-EV/07.ptx
@@ -457,7 +457,7 @@ Prove that, for any column vector <m>\vec{b} = \left[\begin{array}{c}b_1\\b_2\\
                 </p>
     </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-EV7"/>.

diff --git a/source/linear-algebra/source/03-AT/01.ptx b/source/linear-algebra/source/03-AT/01.ptx
@@ -787,7 +787,7 @@ and <m>T(cf(x))=cT(f(x))</m>.
     </exploration>
     </subsection>
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-AT1"/>.

diff --git a/source/linear-algebra/source/03-AT/02.ptx b/source/linear-algebra/source/03-AT/02.ptx
@@ -582,7 +582,7 @@ Prove that each transformation is linear, and that your matrix representations a
                 </p>
     </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-AT2"/>.

diff --git a/source/linear-algebra/source/03-AT/03.ptx b/source/linear-algebra/source/03-AT/03.ptx
@@ -816,7 +816,7 @@ Let <m>\{\vec{v_1},\vec{v_2},\ldots,\vec{v_n}\}</m> be a set of vectors in <m>V<
                 </p>
     </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-AT3"/>.

diff --git a/source/linear-algebra/source/03-AT/04.ptx b/source/linear-algebra/source/03-AT/04.ptx
@@ -1117,7 +1117,7 @@ Prove that <m>V</m> is isomorphic to<m>V^*</m>. Here are some things to think ab
     </ul>
      </p></statement></exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-AT4"/>.

diff --git a/source/linear-algebra/source/03-AT/05.ptx b/source/linear-algebra/source/03-AT/05.ptx
@@ -738,7 +738,7 @@ for <em>all</em> <m>c\in \IR,\, (x_1,y_1),(x_2,y_2) \in V</m>.
                     <p>Consider the vector space of polynomials, <m>\P_n</m>. Suppose further that <m> n= ab</m>, where <m>a \mbox{ and } b</m> are each positive integers. Conjecture a relationship between <m>M_{a,b}</m> and <m>\P_n</m>. We will investigate this further in section <xref ref="AT6"></xref>
                     </p></statement></exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-AT5"/>.

diff --git a/source/linear-algebra/source/03-AT/06.ptx b/source/linear-algebra/source/03-AT/06.ptx
@@ -584,7 +584,7 @@ If you are given the values of <m>a,b,</m> and <m>c</m>, what value of <m>d</m>
     </exploration>
     </subsection>
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-AT6"/>.

diff --git a/source/linear-algebra/source/04-MX/01.ptx b/source/linear-algebra/source/04-MX/01.ptx
@@ -392,7 +392,7 @@ Use the included map in this problem.
                 </statement>
      </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-MX1"/>.

diff --git a/source/linear-algebra/source/04-MX/02.ptx b/source/linear-algebra/source/04-MX/02.ptx
@@ -545,7 +545,7 @@ Is the matrix <m>\left[\begin{array}{ccc} 2 &amp; 3 &amp; 1 \\ -1 &amp; -4 &amp;
          </exploration>
 
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-MX2"/>.

diff --git a/source/linear-algebra/source/04-MX/03.ptx b/source/linear-algebra/source/04-MX/03.ptx
@@ -274,7 +274,7 @@ Video coming soon to
     </subsection>
 
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-MX3"/>.

diff --git a/source/linear-algebra/source/04-MX/04.ptx b/source/linear-algebra/source/04-MX/04.ptx
@@ -402,7 +402,7 @@ If you and a teammate were to do this independently, would you necessarily come
         </p>
     </subsection>
 
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-MX4"/>.

diff --git a/source/linear-algebra/source/05-GT/01.ptx b/source/linear-algebra/source/05-GT/01.ptx
@@ -1141,7 +1141,7 @@ Or we may use a formula:
                 </statement>
      </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-GT1"/>.

diff --git a/source/linear-algebra/source/05-GT/02.ptx b/source/linear-algebra/source/05-GT/02.ptx
@@ -493,7 +493,7 @@ Based on the previous activities, which technique is easier for computing determ
 
      </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-GT2"/>.

diff --git a/source/linear-algebra/source/05-GT/03.ptx b/source/linear-algebra/source/05-GT/03.ptx
@@ -416,7 +416,7 @@ Set this characteristic polynomial equal to zero and factor to determine the eig
                 </statement>
      </exploration>
     </subsection>
-    <subsection>
+    <subsection component="html">
         <title>Sample Problem and Solution</title>
         <p>
             Sample problem <xref ref="sample-GT3"/>.