diff --git a/src/crossover/crossover_methods.py b/src/crossover/crossover_methods.py
index 48c1cf7..2f2c7a5 100644
--- a/src/crossover/crossover_methods.py
+++ b/src/crossover/crossover_methods.py
@@ -1,6 +1,6 @@
 import random
 
-def append_children_from_mating_pool(crossover_method):
+def append_children_to_next_population(crossover_method):
     """Appends the new chromosomes to the next population."""
     return lambda ga:\
         ga.population.append_children(
@@ -29,11 +29,11 @@ def values_to_genes(crossover_method):
 class Crossover_Methods:
 
     # Private method decorators, see above.
-    def __append_children_from_mating_pool(crossover_method):
-        return append_children_from_mating_pool(crossover_method)
-    def __genes_to_chromosome(crossover_method):
+    def _append_children_to_next_population(crossover_method):
+        return append_children_to_next_population(crossover_method)
+    def _genes_to_chromosome(crossover_method):
         return values_to_chromosome(crossover_method)
-    def __values_to_genes(crossover_method):
+    def _values_to_genes(crossover_method):
         return values_to_genes(crossover_method)
 
 
diff --git a/src/initialization/initialization_methods.py b/src/initialization/initialization_methods.py
index 242eb69..edb7a7f 100644
--- a/src/initialization/initialization_methods.py
+++ b/src/initialization/initialization_methods.py
@@ -22,11 +22,11 @@ class Initialization_Methods:
     """Initialization examples that are used as defaults and examples"""
 
     # Private method decorators, see above.
-    def __chromosomes_to_population(initialize):
+    def _chromosomes_to_population(initialize):
         return chromosomes_to_population(initialize)
-    def __genes_to_chromosome(initialize):
+    def _genes_to_chromosome(initialize):
         return genes_to_chromosome(initialize)
-    def __value_to_gene(initialize):
+    def _value_to_gene(initialize):
         return value_to_gene(initialize)
 
 
diff --git a/src/mutation/mutation_methods.py b/src/mutation/mutation_methods.py
index f39518f..f399acc 100644
--- a/src/mutation/mutation_methods.py
+++ b/src/mutation/mutation_methods.py
@@ -25,9 +25,9 @@ def loop_mutations(mutation_method):
 class Mutation_Methods:
 
     # Private method decorators, see above.
-    def __loop_selections(selection_method):
+    def _loop_selections(selection_method):
         return loop_selections(selection_method)
-    def __loop_mutations(mutation_method):
+    def _loop_mutations(mutation_method):
         return loop_mutations(mutation_method)
 
 
diff --git a/src/parent_selection/parent_selection_methods.py b/src/parent_selection/parent_selection_methods.py
index 0785228..87ac82e 100644
--- a/src/parent_selection/parent_selection_methods.py
+++ b/src/parent_selection/parent_selection_methods.py
@@ -9,7 +9,7 @@ def check_selection_probability(selection_method):
         if 0 < ga.selection_probability < 1:
             selection_method(ga)
         else:
-            raise Exception("Selection probability must be greater than 0 to select parents.")
+            raise Exception("Selection probability must be between 0 and 1 to select parents.")
     return helper
 
 
@@ -39,11 +39,11 @@ def ensure_sorted(selection_method):
 class Parent_Selection:
 
     # Private method decorators, see above.
-    def __check_selection_probability(selection_method):
+    def _check_selection_probability(selection_method):
         return check_selection_probability(selection_method)
-    def __check_positive_fitness(selection_method):
+    def _check_positive_fitness(selection_method):
         return check_positive_fitness(selection_method)
-    def __ensure_sorted(selection_method):
+    def _ensure_sorted(selection_method):
         return ensure_sorted(selection_method)
 
 
diff --git a/src/survivor_selection/survivor_selection_methods.py b/src/survivor_selection/survivor_selection_methods.py
index 80c396d..0b8d057 100644
--- a/src/survivor_selection/survivor_selection_methods.py
+++ b/src/survivor_selection/survivor_selection_methods.py
@@ -9,7 +9,7 @@ class Survivor_Selection:
     """Survivor selection determines which individuals should be brought to the next generation"""
 
     # Private method decorator, see above.
-    def __append_to_next_population(survivor_method):
+    def _append_to_next_population(survivor_method):
         return append_to_next_population(survivor_method)
 
 
diff --git a/src/termination_point/termination_methods.py b/src/termination_point/termination_methods.py
index c6f64e9..4c2a999 100644
--- a/src/termination_point/termination_methods.py
+++ b/src/termination_point/termination_methods.py
@@ -57,11 +57,11 @@ class Termination_Methods:
     """Example functions that can be used to terminate the the algorithms loop"""
 
     # Private method decorators, see above.
-    def __add_by_fitness_goal(termination_impl):
+    def _add_by_fitness_goal(termination_impl):
         return add_by_fitness_goal(termination_impl)
-    def __add_by_generation_goal(termination_impl):
+    def _add_by_generation_goal(termination_impl):
         return add_by_generation_goal(termination_impl)
-    def __add_by_tolerance_goal(termination_impl):
+    def _add_by_tolerance_goal(termination_impl):
         return add_by_tolerance_goal(termination_impl)