diff --git a/dna/course/zomes/courses/code/src/content/entry.rs b/dna/course/zomes/courses/code/src/content/entry.rs
new file mode 100644
index 0000000..e5624d7
--- /dev/null
+++ b/dna/course/zomes/courses/code/src/content/entry.rs
@@ -0,0 +1,58 @@
+use hdk::{
+    entry_definition::ValidatingEntryType, 
+    holochain_core_types::{dna::entry_types::Sharing, validation::EntryValidationData},
+    holochain_json_api::{error::JsonError, json::JsonString},
+    holochain_persistence_api::cas::content::Address, 
+};
+use holochain_entry_utils::HolochainEntry; 
+
+#[derive(Serialize, Deserialize, Debug, DefaultJson, Clone)]
+pub struct Content {
+    pub title: String, 
+    pub timestamp: u64, 
+    pub anchor_address: Address, 
+}
+
+impl Content {
+    pub fn new(
+        title: String, 
+        timestamp: u64, 
+        anchor_address: Address, 
+    ) -> Self {
+        title: title, 
+        timestamp: timestamp, 
+        anchor_address: anchor_address,
+    }
+}
+
+impl HolochainEntry for Content  {
+    fn entry_type() -> String {
+        String::from("section")
+    }
+}
+
+// Holochain entry definition for Content 
+pub fn content_entry_def() -> ValidatingEntryType {
+    entry!(
+        name: Content::entry_type(),
+        description: "this is the definition of content",
+        sharing: Sharing::Public, 
+        validation_package: || {
+            hdk::ValidationPackageDefinition::Entry
+        },
+        validation: | validation_data: hdk::EntryValidationData<Content>| {
+            match validation_data {
+                EntryValidationData::Create { .. } => {
+                    Ok(())
+                },
+                EntryValidationData::Modify { .. } => {
+                    Ok(())
+                }, 
+                EntryValidationData::Delete { .. } => {
+                    Ok(())
+                }
+            }
+        }, 
+        links: []
+    )
+}
diff --git a/dna/course/zomes/courses/code/src/content/mod.rs b/dna/course/zomes/courses/code/src/content/mod.rs
new file mode 100644
index 0000000..eb5becf
--- /dev/null
+++ b/dna/course/zomes/courses/code/src/content/mod.rs
@@ -0,0 +1 @@
+pub mod entry;
diff --git a/dna/course/zomes/courses/code/src/lib.rs b/dna/course/zomes/courses/code/src/lib.rs
index 982786f..6812669 100644
--- a/dna/course/zomes/courses/code/src/lib.rs
+++ b/dna/course/zomes/courses/code/src/lib.rs
@@ -22,6 +22,8 @@ use hdk_proc_macros::zome;
 
 mod anchor_trait;
 mod course;
+mod section; 
+mod content;
 
 #[zome]
 mod courses {
@@ -54,9 +56,20 @@ mod courses {
         course::entry::course_entry_def()
     }
 
-    // Section
-    // TODO: implement section entry definitions
+    //  ====================== Section definitions
+    #[entry_def]
+    fn section_anchor_definition() -> ValidatingEntryType {
+        section::anchor::section_anchor_def()
+    }
 
-    // Content
-    // TODO: implement content entry definition
+    #[entry_def]
+    fn section_entry_definition() -> ValidatingEntryType {
+        section::entry::section_entry_def()
+    }
+
+    //  ====================== Content definitions
+    #[entry_def]
+    fn content_entry_definition() -> ValidatingEntryType {
+        content::entry::content_entry_def()
+    }
 }
diff --git a/dna/course/zomes/courses/code/src/section/anchor.rs b/dna/course/zomes/courses/code/src/section/anchor.rs
new file mode 100644
index 0000000..337382a
--- /dev/null
+++ b/dna/course/zomes/courses/code/src/section/anchor.rs
@@ -0,0 +1,62 @@
+#[derive(Serialize, Deserialize, Debug,self::DefaultJson, Clone)]
+pub struct SectionAnchor {
+    pub title: String, 
+    pub timestamp: u64,
+}
+
+impl AnchorTrait for SectionAnchor {
+    fn entry_type() -> String {
+        String::from("section_anchor")
+    }
+    fn link_to() -> String {
+        Section::entry_type()
+    }
+    fn link_type() -> String {
+        "section_anchor->section".to_owned()
+    }
+}
+
+impl SectionAnchor {
+    pub fn new(title: String, timestamp: u64) -> Self {
+        SectionAnchor {
+            title:title, 
+            timestamp: timestamp,
+        }
+    }
+}
+
+pub fn section_anchor_def() -> ValidatingEntryType {
+    entry!(
+        name: SectionAnchor::entry_type(),
+        sharing: Sharing::Public, 
+        validation_package: || {
+            hdk::ValidationPackageDefinition::Entry
+        },
+        validation: | validation_data: hdk::EntryValidationData<SectionAnchor>| {
+            match validation_data{
+                EntryValidationData::Create { .. } => {
+                    Ok(())
+                }, 
+                EntryValidationData::Modify { .. } => {
+                    Ok(())
+                }, 
+                EntryValidationData::Delete { .. } => {
+                    Ok(())
+                }
+            }
+        }, 
+        links:[
+            // link that connects SectionAnchor to the latest Section entry
+            to!(
+                SectionAnchor::link_to(), 
+                link_type: SectionAnchor::link_type(), 
+                validation_package:||{
+                    hdk::ValidationPackageDefinition::Entry
+                }, 
+                validation:|_validation_data: hdk::LinkValidationData|{
+                    Ok(())
+                }
+            )
+        ]
+    )
+}
\ No newline at end of file
diff --git a/dna/course/zomes/courses/code/src/section/entry.rs b/dna/course/zomes/courses/code/src/section/entry.rs
new file mode 100644
index 0000000..595c707
--- /dev/null
+++ b/dna/course/zomes/courses/code/src/section/entry.rs
@@ -0,0 +1,57 @@
+use hdk::{
+    entry_definition::ValidatingEntryType, 
+    holochain_core_types::{dna::entry_types::Sharing, validation::EntryValidationData},
+    holochain_json_api::{error::JsonError, json::JsonString},
+    holochain_persistence_api::cas::content::Address, 
+};
+use holochain_entry_utils::HolochainEntry; 
+
+#[derive(Serialize, Deserialize, Debug, DefaultJson, Clone)]
+pub struct Section {
+    pub title: String, 
+    pub timestamp: u64, 
+    pub anchor_address: Address, 
+}
+
+impl Section {
+    pub fn new(
+        title: String, 
+        timestamp: u64, 
+        anchor_address: Address, 
+    ) -> Self {
+        title: title, 
+        timestamp: timestamp, 
+        anchor_address: anchor_address,
+    }
+}
+
+impl HolochainEntry for Section  {
+    fn entry_type() -> String {
+        String::from("course")
+    }
+}
+
+// Holochain entry definition for Section 
+pub fn section_entry_def() -> ValidatingEntryType {
+    entry!(
+        name: Section::entry_type(),
+        sharing: Sharing::Public, 
+        validation_package: || {
+            hdk::ValidationPackageDefinition::Entry
+        },
+        validation: | validation_data: hdk::EntryValidationData<Section>| {
+            match validation_data {
+                EntryValidationData::Create { .. } => {
+                    Ok(())
+                },
+                EntryValidationData::Modify { .. } => {
+                    Ok(())
+                }, 
+                EntryValidationData::Delete { .. } => {
+                    Ok(())
+                }
+            }
+        }, 
+        links: []
+    )
+}
diff --git a/dna/course/zomes/courses/code/src/section/mod.rs b/dna/course/zomes/courses/code/src/section/mod.rs
new file mode 100644
index 0000000..4a7779e
--- /dev/null
+++ b/dna/course/zomes/courses/code/src/section/mod.rs
@@ -0,0 +1,2 @@
+pub mod anchor; 
+pub mod entry;