diff --git a/README.rst b/README.rst
index 4cdcba8..c85d344 100644
--- a/README.rst
+++ b/README.rst
@@ -89,7 +89,7 @@ For adding new api please refer https://github.com/openstack/valence/blob/master
 
 valence-ui
 ----------
-valence-ui provides a Web based GUI interface that can be used to explore
+valence-ui provides a Web-based GUI interface that can be used to explore
 Rack Scale Design (RSD) artifacts and compose/disassemble nodes.
 valence-ui is implemented using Node.js runtime environment and hosted through apache.
 valence-ui makes us of React.js javascript libaray and invoke Valence REST APIs through ajax REST calls.
diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 10e7c38..33e12f8 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -165,7 +165,7 @@ node_property:
   type: array
 node_provision_state:
   description: |
-    The composed node state value set by other orchestation tool, use this value
+    The composed node state value set by other orchestration tool, use this value
     to help with orchestration software know its proviision progress.
   in: body
   required: true
diff --git a/api-ref/source/valence-api-v1-nodes.inc b/api-ref/source/valence-api-v1-nodes.inc
index 9f71c57..e5c2787 100644
--- a/api-ref/source/valence-api-v1-nodes.inc
+++ b/api-ref/source/valence-api-v1-nodes.inc
@@ -248,7 +248,7 @@ Resource attach/detach
 
 .. rest_method::  POST /v1/nodes/{node_ident}/action
 
-Send a attach/detach cmd to a composed node.
+Send an attach/detach cmd to a composed node.
 
 Normal response codes: 204
 
diff --git a/doc/source/developer-guide/add_new_api.rst b/doc/source/developer-guide/add_new_api.rst
index 7626309..d73efc9 100644
--- a/doc/source/developer-guide/add_new_api.rst
+++ b/doc/source/developer-guide/add_new_api.rst
@@ -61,7 +61,7 @@ Consider we want to implement a new API /v1/example that returns "hello world" j
 
            LOG = logging.getLogger(__name__)
 
-           class Example(Resorce):
+           class Example(Resource):
                def get(self):
                LOG.debug("GET /example")
                return {“msg” : “hello world”}
diff --git a/doc/source/developer-guide/add_new_unit_test.rst b/doc/source/developer-guide/add_new_unit_test.rst
index 2f53e9a..f9526fa 100644
--- a/doc/source/developer-guide/add_new_unit_test.rst
+++ b/doc/source/developer-guide/add_new_unit_test.rst
@@ -36,9 +36,9 @@ Unit tests scripts are located in `<valence_root>/valence/tests/unit/
 Implement a Unit Test Case
 -----------------------------
 
-Consider implementing an unit test case for our example unit module.
+Consider implementing a unit test case for our example unit module.
 
-To implement an unit test case for the example unit module,
+To implement a unit test case for the example unit module,
 
 Create a class in valence/tests/unit/(directory)/test_(example).py,
 which inherits the TestCase class from unittest.
diff --git a/doc/source/developer-guide/db_development.rst b/doc/source/developer-guide/db_development.rst
index dfe2f7a..9f8ebf7 100644
--- a/doc/source/developer-guide/db_development.rst
+++ b/doc/source/developer-guide/db_development.rst
@@ -35,7 +35,7 @@ Add a model for db
 Models are defined in the valence/db/models.py file. A new model
 should be updated there.
 
-To add a example model for Etcd db, we should create
+To add an example model for Etcd db, we should create
 a class that inherits the ModelBase class in valence/db/models.py.
 
 .. NOTE::
diff --git a/valence/common/exception.py b/valence/common/exception.py
index 304741e..2f586dc 100644
--- a/valence/common/exception.py
+++ b/valence/common/exception.py
@@ -53,7 +53,7 @@ class ValenceConfirmation(base.ObjectBase):
     """Valence Confirmation Message representation.
 
        Whenever confirmation response needs to send back to client
-       for successfull operation
+       for successful operation
 
     """
 
diff --git a/valence/flavors/flavors.py b/valence/flavors/flavors.py
index dd2c683..373925d 100644
--- a/valence/flavors/flavors.py
+++ b/valence/flavors/flavors.py
@@ -37,9 +37,9 @@ def get_available_criteria():
 
 
 def create_flavors(data):
-    """criteria : comma seperated generator names
+    """criteria : comma separated generator names
 
-       This should be same as thier file name)
+       This should be same as their file name)
 
     """
     criteria = data["criteria"]