Which of the following is a specific and measurable instructional objective?

A specific and measurable instructional objective clearly outlines the expected outcome in a way that can be assessed quantitatively. The chosen option states that a student will match values related to fractions with specified attempts. This objective is specific because it identifies the exact task—matching values with fractions. It is also measurable, as it can be evaluated based on the number of correct matches the student achieves during the identified attempts. This allows educators to determine whether the learning goal has been met and to what extent.

In contrast, the other options lack the precision or measurable criteria. For example, decoding words at above-grade level does not specify what "above-grade level" entails or establish a metric for assessment. Similarly, learning a majority of spelling words is vague, as it does not define what constitutes a "majority" or how it would be measured. Finally, using proper conventions in writing is broad and does not specify which conventions will be assessed or how successful application will be evaluated. Thus, option D stands out as the most effective instructional objective.