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    <h1>Big Word Club (BWC)</h1>
    <small class="dont-index">Source: <a href="https://github.com/bayes-rules/bayesrules/blob/HEAD/R/data_big_word_club.R" class="external-link"><code>R/data_big_word_club.R</code></a></small>
    <div class="hidden name"><code>big_word_club.Rd</code></div>
    </div>

    <div class="ref-description">
    <p>Data on the effectiveness of a digital learning program designed by the Abdul Latif Jameel Poverty Action Lab (J-PAL) to address disparities in vocabulary levels among children from households with different income levels.</p>
    </div>

    <div id="ref-usage">
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="va">big_word_club</span></code></pre></div>
    </div>

    <div id="format">
    <h2>Format</h2>
    <p>A data frame with 818 student-level observations and 31 variables:</p><dl><dt>participant_id</dt>
<dd><p>unique student id</p></dd>

  <dt>treat</dt>
<dd><p>control group (0) or treatment group (1)</p></dd>

  <dt>age_months</dt>
<dd><p>age in months</p></dd>

  <dt>female</dt>
<dd><p>whether student identifies as female</p></dd>

  <dt>kindergarten</dt>
<dd><p>grade level, pre-school (0) or kindergarten (1)</p></dd>

  <dt>teacher_id</dt>
<dd><p>unique teacher id</p></dd>

  <dt>school_id</dt>
<dd><p>unique school id</p></dd>

  <dt>private_school</dt>
<dd><p>whether school is private</p></dd>

  <dt>title1</dt>
<dd><p>whether school has Title 1 status</p></dd>

  <dt>free_reduced_lunch</dt>
<dd><p>percent of school that receive free / reduced lunch</p></dd>

  <dt>state</dt>
<dd><p>school location</p></dd>

  <dt>esl_observed</dt>
<dd><p>whether student has ESL status</p></dd>

  <dt>special_ed_observed</dt>
<dd><p>whether student has special education status</p></dd>

  <dt>new_student</dt>
<dd><p>whether student enrolled after program began</p></dd>

  <dt>distracted_a1</dt>
<dd><p>student's distraction level during assessment 1 (0 = not distracted; 1 = mildly distracted; 2 = moderately distracted; 3 = extremely distracted)</p></dd>

  <dt>distracted_a2</dt>
<dd><p>same as distracted_a1 but during assessment 2</p></dd>

  <dt>distracted_ppvt</dt>
<dd><p>same as distracted_a1 but during standardized assessment</p></dd>

  <dt>score_a1</dt>
<dd><p>student score on BWC assessment 1</p></dd>

  <dt>invalid_a1</dt>
<dd><p>whether student's score on assessment 1 was invalid</p></dd>

  <dt>score_a2</dt>
<dd><p>student score on BWC assessment 2</p></dd>

  <dt>invalid_a2</dt>
<dd><p>whether student's score on assessment 2 was invalid</p></dd>

  <dt>score_ppvt</dt>
<dd><p>student score on standardized assessment</p></dd>

  <dt>score_ppvt_age</dt>
<dd><p>score_ppvt adjusted for age</p></dd>

  <dt>invalid_ppvt</dt>
<dd><p>whether student's score on standardized assessment was invalid</p></dd>

  <dt>t_logins_april</dt>
<dd><p>number of teacher logins onto BWC system in April</p></dd>

  <dt>t_logins_total</dt>
<dd><p>number of teacher logins onto BWC system during entire study</p></dd>

  <dt>t_weeks_used</dt>
<dd><p>number of weeks of the BWC program that the classroom has completed</p></dd>

  <dt>t_words_learned</dt>
<dd><p>teacher response to the number of words students had learned through BWC (0 = almost none; 1 = 1 to 5; 2 = 6 to 10)</p></dd>

  <dt>t_financial_struggle</dt>
<dd><p>teacher response to the number of their students that have families that experience financial struggle</p></dd>

  <dt>t_misbehavior</dt>
<dd><p>teacher response to frequency that student misbehavior interferes with teaching (0 = never; 1 = rarely; 2 = occasionally; 3 = frequently)</p></dd>

  <dt>t_years_experience</dt>
<dd><p>teacher's number of years of teaching experience</p></dd>

  <dt>score_pct_change</dt>
<dd><p>percent change in scores before and after the program</p></dd>

  
</dl></div>
    <div id="source">
    <h2>Source</h2>
    <p>These data correspond to the following study: Ariel Kalil, Susan Mayer, Philip Oreopoulos (2020). Closing the word gap with Big Word Club: Evaluating the Impact of a Tech-Based Early Childhood Vocabulary Program. Data was obtained through the was obtained through the Inter-university Consortium for Political and Social Research (ICPSR) <a href="https://www.openicpsr.org/openicpsr/project/117330/version/V1/view/" class="external-link">https://www.openicpsr.org/openicpsr/project/117330/version/V1/view/</a>.</p>
    </div>

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