What does this mean?

People using screen readers are not able to see the layout of a form. To make forms accessible, they must define explicit text labels for each form control.

Usually the best solution is to use a <label> element. The label may be linked to by the form control:

<label for="name">Full name</label>
<input type="name" id="name">

or the <label> can be wrapped around the form control:

    Full name <input type="name">

Buttons are different, as their labels are specified by the code for the button, e.g.

<input type="submit" value="Send message">
<button>Send message</button>

Alternatively ARIA attributes, such as aria-label may be used, but this information will not be conveyed to visual users. For more information, see W3C's guide to labeling controls.

Hidden input fields (<input type="hidden">) do not require labels. Note that the placeholder attribute should not be used as an alternative to a label.

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How close this website is to fixing this issue.

HTML Found on page Issues
<input type="submit" id="submit" value="&nbsp;Calculate!&nbsp;"> 1
<input id="credithours2" class="semester-hours form-text" type="text" name="credithours2" value size="5" maxlength="128"> 1
<select id="grade6" class="semester-grade form-select" name="grade6">...</select> 1
<input id="credithours4" class="semester-hours form-text" type="text" name="credithours4" value size="5" maxlength="128"> 1
<input id="credithours6" class="semester-hours form-text" type="text" name="credithours6" value size="5" maxlength="128"> 1
<input id="prev-gpa" type="text" name="previous_gpa" value size="5" maxlength="128" class="form-text"> 1
<input id="credithours5" class="semester-hours form-text" type="text" name="credithours5" value size="5" maxlength="128"> 1
<select id="grade2" class="semester-grade form-select" name="grade2">...</select> 1
<input id="credithours1" class="semester-hours form-text" type="text" name="credithours1" value size="5" maxlength="128"> 1
<input id="prev-credits" type="text" name="previous_credits" value size="5" maxlength="128" class="form-text"> 1
19 distinct issues were found in the sample of 125 web pages. Only the first 10 issues are shown here.
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