diff --git a/erpnext/__init__.py b/erpnext/__init__.py
index 706a8e5..4f53d0d 100644
--- a/erpnext/__init__.py
+++ b/erpnext/__init__.py
@@ -2,7 +2,7 @@
 from __future__ import unicode_literals
 import frappe
 
-__version__ = '7.2.19'
+__version__ = '7.2.21'
 
 def get_default_company(user=None):
 	'''Get default company for user'''
diff --git a/erpnext/schools/doctype/assessment/assessment.py b/erpnext/schools/doctype/assessment/assessment.py
index 003b427..5088336 100644
--- a/erpnext/schools/doctype/assessment/assessment.py
+++ b/erpnext/schools/doctype/assessment/assessment.py
@@ -34,7 +34,7 @@
 			validate_overlap_for(self, "Assessment", "student_group")
 		
 		validate_overlap_for(self, "Assessment", "room")
-		validate_overlap_for(self, "Assessment", "supervisor", self.instructor)
+		validate_overlap_for(self, "Assessment", "supervisor", self.supervisor)
 
 
 def get_assessment_list(doctype, txt, filters, limit_start, limit_page_length=20):
diff --git a/erpnext/utilities/__init__.py b/erpnext/utilities/__init__.py
index bba21e6..b94061c 100644
--- a/erpnext/utilities/__init__.py
+++ b/erpnext/utilities/__init__.py
@@ -1,6 +1,7 @@
 ## temp utility
 
 import frappe
+from erpnext.utilities.activation import get_level
 
 def update_doctypes():
 	for d in frappe.db.sql("""select df.parent, df.fieldname
@@ -29,5 +30,6 @@
 
 	return {
 		'company': company,
-		'domain': domain
+		'domain': domain,
+		'activation': get_level()
 	}
diff --git a/erpnext/utilities/activation.py b/erpnext/utilities/activation.py
new file mode 100644
index 0000000..563f71e
--- /dev/null
+++ b/erpnext/utilities/activation.py
@@ -0,0 +1,36 @@
+import frappe
+
+def get_level():
+	activation_level = 0
+	if frappe.db.get_single_value('System Settings', 'setup_complete'):
+		activation_level = 1
+
+	if frappe.db.count('Item') > 5:
+		activation_level += 1
+
+	if frappe.db.count('Customer') > 5:
+		activation_level += 1
+
+	if frappe.db.count('Sales Order') > 2:
+		activation_level += 1
+
+	if frappe.db.count('Purchase Order') > 2:
+		activation_level += 1
+
+	if frappe.db.count('Employee') > 3:
+		activation_level += 1
+
+	if frappe.db.count('Payment Entry') > 2:
+		activation_level += 1
+
+	if frappe.db.count('Communication', dict(communication_medium='Email')) > 10:
+		activation_level += 1
+
+	if frappe.db.count('User') > 5:
+		activation_level += 1
+
+	# recent login
+	if frappe.db.sql('select name from tabUser where last_login > date_sub(now(), interval 2 day) limit 1'):
+		activation_level += 1
+
+	return activation_level
\ No newline at end of file