diff --git a/src/config/mappings.py b/src/config/mappings.py
new file mode 100644
index 0000000..2fc4386
--- /dev/null
+++ b/src/config/mappings.py
@@ -0,0 +1,253 @@
+"""
+Data mappings and constants for the Student Success Predictor app
+Contains all the human-readable mappings for categorical features
+"""
+
+
+def create_feature_mappings():
+    """Create human-readable mappings for categorical features"""
+
+    # Marital status mapping
+    marital_status_map = {
+        1: "Single",
+        2: "Married",
+        3: "Widowed",
+        4: "Divorced",
+        5: "Civil Union",
+        6: "Legally Separated",
+    }
+
+    # Application mode mapping
+    application_mode_map = {
+        1: "1st Phase - General Contingent",
+        2: "Ordinance No. 612/93",
+        5: "1st Phase - Special Contingent (Azores)",
+        7: "Holders of Other Higher Courses",
+        10: "Ordinance No. 854-B/99",
+        15: "International Student (Bachelor)",
+        16: "1st Phase - Special Contingent (Madeira)",
+        17: "2nd Phase - General Contingent",
+        18: "3rd Phase - General Contingent",
+        26: "Ordinance No. 533-A/99, item b2",
+        27: "Ordinance No. 533-A/99, item b3",
+        39: "Over 23 years old",
+        42: "Transfer",
+        43: "Change of course",
+        44: "Technological specialization diploma holders",
+        51: "Change of institution/course",
+        53: "Short cycle diploma holders",
+        57: "Change of institution/course (International)",
+    }
+
+    # Course mapping
+    course_map = {
+        33: "Biofuel Production Technologies",
+        171: "Animation and Multimedia Design",
+        8014: "Social Service (evening attendance)",
+        9003: "Agronomy",
+        9070: "Communication Design",
+        9085: "Veterinary Nursing",
+        9119: "Informatics Engineering",
+        9130: "Equinculture",
+        9147: "Management",
+        9238: "Social Service",
+        9254: "Tourism",
+        9500: "Nursing",
+        9556: "Oral Hygiene",
+        9670: "Advertising and Marketing Management",
+        9773: "Journalism and Communication",
+        9853: "Basic Education",
+        9991: "Management (evening attendance)",
+    }
+
+    # Previous qualification mapping
+    qualification_map = {
+        1: "Secondary education",
+        2: "Higher education - bachelor's degree",
+        3: "Higher education - degree",
+        4: "Higher education - master's",
+        5: "Higher education - doctorate",
+        6: "Frequency of higher education",
+        9: "12th year of schooling - not completed",
+        10: "11th year of schooling - not completed",
+        12: "Other - 11th year of schooling",
+        14: "10th year of schooling",
+        15: "10th year of schooling - not completed",
+        19: "Basic education 3rd cycle (9th/10th/11th year) or equiv.",
+        38: "Basic education 2nd cycle (6th/7th/8th year) or equiv.",
+        39: "Technological specialization course",
+        40: "Higher education - degree (1st cycle)",
+        42: "Professional course",
+        43: "Higher education - master (2nd cycle)",
+    }
+
+    # Occupation mapping
+    occupation_map = {
+        0: "Student",
+        1: "Representatives of the Legislative Power and Executive Bodies",
+        2: "Specialists in Intellectual and Scientific Activities",
+        3: "Intermediate Level Technicians and Professions",
+        4: "Administrative staff",
+        5: "Personal Services, Security and Safety Workers",
+        6: "Farmers and Skilled Workers in Agriculture",
+        7: "Skilled Workers in Industry, Construction and Craftsmen",
+        8: "Installation and Machine Operators and Assembly Workers",
+        9: "Unskilled Workers",
+        10: "Armed Forces Professions",
+        90: "Other Situation",
+        99: "Unspecified",
+        122: "Health professionals",
+        123: "Teachers",
+        125: "Specialists in information and communication technologies",
+        131: "Intermediate level science and engineering technicians",
+        132: "Technicians and associate professionals, health",
+        134: "Intermediate level technicians from legal, social, sports",
+        141: "Office workers, secretaries in general and data processing",
+        143: "Data, accounting, statistical, financial services",
+        144: "Other administrative support staff",
+        151: "Personal service workers",
+        152: "Sellers",
+        153: "Personal care workers and the like",
+        171: "Skilled construction workers and the like, except electricians",
+        173: "Skilled workers in printing, precision instrument manufacturing",
+        175: "Workers in food processing, woodworking, clothing",
+        191: "Cleaning workers",
+        192: "Unskilled workers in agriculture, animal production",
+        193: "Unskilled workers in extractive industry, construction",
+        194: "Meal preparation assistants",
+    }
+
+    return {
+        "marital_status": marital_status_map,
+        "application_mode": application_mode_map,
+        "course": course_map,
+        "qualification": qualification_map,
+        "occupation": occupation_map,
+    }
+
+
+# Preset configurations for quick form filling
+PRESET_CONFIGURATIONS = {
+    "Custom Entry": {
+        "age": 20,
+        "gender": 0,
+        "marital": 1,
+        "app_mode": 1,
+        "course": 9254,
+        "prev_grade": 120,
+        "adm_grade": 120,
+    },
+    "Typical Graduate Student": {
+        "age": 19,
+        "gender": 1,
+        "marital": 1,
+        "app_mode": 15,
+        "course": 9254,
+        "prev_grade": 160,
+        "adm_grade": 142,
+    },
+    "At-Risk Student": {
+        "age": 22,
+        "gender": 1,
+        "marital": 1,
+        "app_mode": 17,
+        "course": 171,
+        "prev_grade": 100,
+        "adm_grade": 110,
+    },
+    "International Student": {
+        "age": 21,
+        "gender": 0,
+        "marital": 1,
+        "app_mode": 1,
+        "course": 9238,
+        "prev_grade": 135,
+        "adm_grade": 130,
+    },
+}
+
+# Academic performance defaults for presets
+ACADEMIC_DEFAULTS = {
+    "Custom Entry": {
+        "1st_sem": {
+            "enrolled": 6,
+            "approved": 6,
+            "grade": 13,
+            "credited": 0,
+            "evaluations": 6,
+            "without": 0,
+        },
+        "2nd_sem": {
+            "enrolled": 6,
+            "approved": 6,
+            "grade": 13,
+            "credited": 0,
+            "evaluations": 6,
+            "without": 0,
+        },
+    },
+    "Typical Graduate Student": {
+        "1st_sem": {
+            "enrolled": 6,
+            "approved": 6,
+            "grade": 14,
+            "credited": 0,
+            "evaluations": 6,
+            "without": 0,
+        },
+        "2nd_sem": {
+            "enrolled": 6,
+            "approved": 6,
+            "grade": 14,
+            "credited": 0,
+            "evaluations": 6,
+            "without": 0,
+        },
+    },
+    "At-Risk Student": {
+        "1st_sem": {
+            "enrolled": 6,
+            "approved": 0,
+            "grade": 0,
+            "credited": 0,
+            "evaluations": 0,
+            "without": 0,
+        },
+        "2nd_sem": {
+            "enrolled": 6,
+            "approved": 0,
+            "grade": 0,
+            "credited": 0,
+            "evaluations": 0,
+            "without": 0,
+        },
+    },
+    "International Student": {
+        "1st_sem": {
+            "enrolled": 6,
+            "approved": 6,
+            "grade": 13,
+            "credited": 0,
+            "evaluations": 6,
+            "without": 0,
+        },
+        "2nd_sem": {
+            "enrolled": 6,
+            "approved": 6,
+            "grade": 14,
+            "credited": 0,
+            "evaluations": 6,
+            "without": 0,
+        },
+    },
+}
+
+# Validation constants
+VALIDATION_RULES = {
+    "min_age": 17,
+    "max_age": 70,
+    "min_grade": 0,
+    "max_grade": 20,
+    "min_qualification_grade": 95,
+    "max_qualification_grade": 190,
+}