     game_spawn: "Spel Spawn"
     graphics: "Graphics"
     graphs: "Graphs"
-#    heaps: "Heaps"
+    heaps: "Data Opslag"
     if_else_statements: "If/Else Statements"
     if_statements: "If-instructie"
     if_statements_nested: "Geneste If Statemnts"
-#    indexing: "Array Indexes"
-#    input_handling_flags: "Input Handling - Flags"
-#    input_handling_keyboard: "Input Handling - Keyboard"
-#    input_handling_mouse: "Input Handling - Mouse"
+    indexing: "Array Indexen"
+    input_handling_flags: "Input Verwerking - Vlaggen"
+    input_handling_keyboard: "Input Verwerking - Keyboard"
+    input_handling_mouse: "Input Verwerking - Muis"
     intermediate_css_rules: "Medior CSS Regels"
     intermediate_css_selectors: "Medior CSS Selectors"
     intermediate_html_attributes: "Medior HTML Attributen"

    boolean_and: "Boolean En"
    boolean_equality: "Boolean Gelijk"
    boolean_greater_less: "Boolean Groter/Kleiner"
#    boolean_logic_shortcircuit: "Boolean Logic Shortcircuiting"
    boolean_not: "Boolean Niet"
#    boolean_operator_precedence: "Boolean Operator Precedence"
    boolean_or: "Boolean Of"
    bootstrap: "Bootstrap"
    break_statements: "Break instructie"

    parameters: "Parameters"
    property_access: "Eigenschappen Uitlezen"
    property_assignment: "Eigenschappen Toewijzen"
    queues: "Data Structuren - Wachtrijen"
    reading_docs: "Documentatie Lezen"
    recursion: "Recursie"
    return_statements: "Return Statements"
