diff --git a/src/main/java/ai/elimu/util/AppConstants.java b/src/main/java/ai/elimu/util/ReadingLevelConstants.java
similarity index 100%
rename from src/main/java/ai/elimu/util/AppConstants.java
rename to src/main/java/ai/elimu/util/ReadingLevelConstants.java
diff --git a/src/test/resources/ai/elimu/util/reading_level/model1.pmml b/src/test/resources/ai/elimu/util/reading_level/model1.pmml
deleted file mode 100644
index f407bae04..000000000
--- a/src/test/resources/ai/elimu/util/reading_level/model1.pmml
+++ /dev/null
@@ -1,41 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<PMML version="4.4" xmlns="http://www.dmg.org/PMML-4_4">
-    <Header>
-        <Application name="Decision Tree Regressor" version="1.0"/>
-    </Header>
-    <DataDictionary numberOfFields="4">
-        <DataField name="chapter_count" optype="continuous" dataType="integer"/>
-        <DataField name="paragraph_count" optype="continuous" dataType="integer"/>
-        <DataField name="word_count" optype="continuous" dataType="integer"/>
-        <DataField name="reading_level" optype="continuous" dataType="double"/>
-    </DataDictionary>
-    <TreeModel functionName="regression" algorithmName="DecisionTree" missingValueStrategy="none">
-        <MiningSchema>
-            <MiningField name="chapter_count"/>
-            <MiningField name="paragraph_count"/>
-            <MiningField name="word_count"/>
-            <MiningField name="reading_level" usageType="target"/>
-        </MiningSchema>
-        <Node score="1.0">
-            <True/>
-            <Node score="1.0">
-                <SimplePredicate field="chapter_count" operator="lessThan" value="10"/>
-                <Node score="1.0">
-                    <SimplePredicate field="paragraph_count" operator="lessOrEqual" value="20"/>
-                </Node>
-                <Node score="2.0">
-                    <SimplePredicate field="paragraph_count" operator="greaterThan" value="20"/>
-                </Node>
-            </Node>
-            <Node score="2.0">
-                <SimplePredicate field="chapter_count" operator="greaterOrEqual" value="10"/>
-                <Node score="2.0">
-                    <SimplePredicate field="word_count" operator="lessThan" value="300"/>
-                </Node>
-                <Node score="3.0">
-                    <SimplePredicate field="word_count" operator="greaterOrEqual" value="300"/>
-                </Node>
-            </Node>
-        </Node>
-    </TreeModel>
-</PMML>
\ No newline at end of file