Which of the following can NOT be considered a feature of a constructivist Mathematics classroom ?

The correct option is Objective type test items are used as the primary means of assessment.

Constructivism in Mathematics Education:
Constructivism is a learning theory which states that learners actively construct knowledge rather than passively taking in information. In a constructivist mathematics classroom:
1. Dialogue and Language: Students actively engage in mathematical discussions, discussions, and dialogue to build and refine their understanding.
2. Multiple Understandings: The teacher recognizes that individual students bring unique prior experiences, allowing them to construct different yet valid interpretations and problem-solving strategies.
3. Interdisciplinary Connections: Mathematics is connected to other subjects and real-world contexts to make learning meaningful.

Assessment in Constructivism:
Constructivist assessment relies on continuous, qualitative, authentic, and process-oriented evaluation (such as open-ended tasks, projects, portfolios, and observation). Relying primarily on objective type test items focuses heavily on rote memorization and single correct answers, which restricts active inquiry and deep conceptual understanding.

Therefore, using objective-type tests as the primary assessment method is NOT a feature of a constructivist mathematics classroom.