diff --git a/reasoning_gym/arc/__init__.py b/reasoning_gym/arc/__init__.py
index d422e098..fcb2b262 100644
--- a/reasoning_gym/arc/__init__.py
+++ b/reasoning_gym/arc/__init__.py
@@ -1,10 +1,11 @@
-from .arc_1d import Arc1DConfig, Arc1DDataset
+from .arc_1d import Arc1DConfig, Arc1DCurriculum, Arc1DDataset
 from .arc_agi import ArcAgiConfig, ArcAgiDataset
 from .rearc import ReArcConfig, ReArcCurriculum, ReArcDataset
 
 __all__ = [
     "Arc1DConfig",
     "Arc1DDataset",
+    "Arc1DCurriculum",
     "ArcAgiConfig",
     "ArcAgiDataset",
     "ReArcDataset",
diff --git a/reasoning_gym/arc/arc_1d.py b/reasoning_gym/arc/arc_1d.py
index 9a7ee78c..0dfc5bb0 100644
--- a/reasoning_gym/arc/arc_1d.py
+++ b/reasoning_gym/arc/arc_1d.py
@@ -2,6 +2,7 @@ from dataclasses import dataclass
 from random import Random
 from typing import Optional
 
+from ..coaching import BaseCurriculum, RangeAttributeDefinition
 from ..dataset import ProceduralDataset
 from ..factory import register_dataset
 
@@ -108,9 +109,31 @@ class Arc1DDataset(ProceduralDataset):
                 "size": size,
                 "train_examples": train_examples,
                 "test_example": test_example,
+                "difficulty": {
+                    "size": (self.config.min_size, self.config.max_size),
+                },
             },
         }
 
 
+class Arc1DCurriculum(BaseCurriculum):
+    """Curriculum for ARC 1D tasks"""
+
+    def __init__(self):
+        super().__init__(Arc1DCurriculum.__name__, Arc1DConfig)
+
+        # Define attributes
+        self._define_attributes(
+            RangeAttributeDefinition(
+                name="size",
+                levels=[10, 25, 50, 100],
+                lower_field_name="min_size",
+                upper_field_name="max_size",
+                description="Grid size",
+                ensure_interval=True,
+            )
+        )
+
+
 # Register the dataset
-register_dataset(DATASET_NAME, Arc1DDataset, Arc1DConfig)
+register_dataset(DATASET_NAME, Arc1DDataset, Arc1DConfig, Arc1DCurriculum)
diff --git a/tests/test_arc_1d.py b/tests/test_arc_1d.py
index 1eeb0d09..8a267268 100644
--- a/tests/test_arc_1d.py
+++ b/tests/test_arc_1d.py
@@ -2,7 +2,7 @@ from random import Random
 
 import pytest
 
-from reasoning_gym.arc import Arc1DConfig, Arc1DDataset
+from reasoning_gym.arc import Arc1DConfig, Arc1DCurriculum, Arc1DDataset
 
 
 def test_arc_1d_config_validation():
@@ -41,6 +41,7 @@ def test_arc_1d_items():
         assert "question" in item
         assert "answer" in item
         assert "metadata" in item
+        assert "difficulty" in item["metadata"]
 
         # Check metadata contents
         metadata = item["metadata"]
@@ -142,3 +143,44 @@ def test_arc_1d_generate_all_tasks():
                     break
             assert i < 20
             print(task_name, j, i, x)
+
+
+def test_arc_1d_curriculum():
+    """Test the curriculum for complex arithmetic."""
+    curriculum = Arc1DCurriculum()
+    base_value = {"size": 150, "seed": 1}
+
+    base_cfg: Arc1DCurriculum = curriculum.generate_configuration(base_value)
+
+    assert base_cfg.seed == 1
+    assert base_cfg.size == 150
+    assert base_cfg.min_size == 10
+    assert base_cfg.max_size == 25
+
+    # Test and validate increase in levels
+    curriculum.increment_attr_level("size")
+
+    increased_cfg: Arc1DCurriculum = curriculum.generate_configuration(base_value)
+    assert increased_cfg.min_size == 10
+    assert increased_cfg.max_size == 50
+
+    # Test and validate decrease in levels
+    curriculum.decrement_attr_level("size")
+
+    decreased_cfg: Arc1DCurriculum = curriculum.generate_configuration(base_value)
+    assert decreased_cfg.min_size == 10
+    assert decreased_cfg.max_size == 25
+
+    # Test upper bound boundary condition
+    for _ in range(10):
+        curriculum.increment_attr_level("size")
+    upper_bound_cfg: Arc1DCurriculum = curriculum.generate_configuration(base_value)
+    assert upper_bound_cfg.min_size == 10
+    assert upper_bound_cfg.max_size == 100
+
+    # Test lower bound boundary condition
+    for _ in range(10):
+        curriculum.decrement_attr_level("size")
+    lower_bound_cfg: Arc1DCurriculum = curriculum.generate_configuration(base_value)
+    assert lower_bound_cfg.min_size == 10
+    assert lower_bound_cfg.max_size == 25