This study aimed to describe students' ability to arrange proof of abstract algebra problems (Subgroups) after receiving Information Technology (IT)-assisted scaffolding materials. To achieve this objective, we conducted exploratory qualitative research with students of Mathematics Education, Universitas PGRI Ronggolawe Tuban, participating in the algebraic structure course with subgroup topics classes as the research subject. Data were collected after students had learned the IT-assisted scaffolding strategies. The types of scaffolding used in the current study included conceptual, strategic, metacognitive, and procedural scaffolding with IT-assisted implementation. The researchers made measurements with the help of ability tests to prove subgroup problems and an interview guide. Students' ability to construct proof was measured based on indicators of making conjectures, providing proof, and providing non-proof arguments. The analysis showed that a) students can make good conjectures based on the statements/data provided; b) students can construct subgroup proofs with a good proof flow. Most proof arguments refer to related concepts (definitions, axioms, theorems, and previously proven proofs); and c) students can make good non-proof arguments. The implication of this study is that IT-assisted scaffolding can be used as an alternative strategy to improve the ability to prove subgroup topic problems.